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• A rate is a ratio of the form a*/ (a+b) a* = the frequency of events during a certain time period a+b = the number at risk of the event during that time period Ratio & Proportion. PUDUCHERY 2,598 4. Demography ppt 1. The percent proportion fractions jeopardy (vrml schools) Ratios, Proportions (West Bender Middle School) Ratio and Rates (gallinggatewayschool) Ratio and Rates Usually defined as No. If you continue browsing the site, you agree to the use of cookies on this website. $58.50 Setting your problem up $52.21 buys you 63 loads $39.99 buys you 40 loads $52.21 63 loads $39.99 40 loads WANT A … NOTE: Dependency Ratio does not take into account labor force participation rates by age group.
You can find an equivalent ratio by multiplying or dividing both terms of a ratio by the same number. Age Sex Specific Mortality Rate It refers to number of deaths by particular age and sex per 1000 mid year population of the same age and sex.Specific death rates continued…. The growth rate of Saudi Arabia’s population is likely to decrease to 1.09 by the year 2030, and further fall to 0.277 during the next 30 years, by the year 2060. .Birth Rate Birth rate is the simplest indicator of fertility and is defined as the number of live births per 1000 estimated mid year population in a given year. : Death rates continued…. Using data from Table 3-1, the following example demonstrates the use of Equation 3-2. Flash
of deaths during the year x 1000 Mid-Year population during same year It is the simplest method of finding out death rates.CRUDE BIRTH AND DEATH RATES IN INDIA 2011.: CRUDE BIRTH AND DEATH RATES IN INDIA 2011. Demography (from prefix demo-from Ancient Greek δῆμος dēmos meaning "the people", and -graphy from γράφω graphō, ies "writing, description or measurement") is the statistical study of populations, especially human beings.. Demographic analysis can cover whole societies or groups defined by criteria such as education, nationality, religion, and ethnicity. Medical geography. ppt, 3 MB. Looks like you’ve clipped this slide to already. Example 5:3 ≠ 3:5 3. HTTPS (Hypertext Transfer Protocol Secure) is a protocol used by Web servers to transfer and display Web content securely. NOTE: Dependency Ratio does not take into account labor force participation rates by age group. Density of population in India in 1901 was 77 persons/sq.km .
Ratios, Rates, and Proportions Section 1.8 RATIOS A ratio is the comparison of two quantities with the same unit. Instead of comparing risk via a ratio, we compare risks via a difference. of literate persons aged 7 and above Population aged 7 and above literacy rate in india 1951-2011: literacy rate in india 1951-2011 CENSUS YEAR PERSONS MALES FEMALES 1951 18.33 27.16 8.86 1961 28.3 40.4 15.35 1971 34.45 45.96 21.97 1981 43.57 56.38 29.76 1991 52.21 64.13 39.29 2001 64.83 75.26 53.67 2011 74.04 82.14 65.462. Dynamic
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but in 2011, 382 persons/sq.km.DENSITY OF POPULATION:: DENSITY OF POPULATION: CENSUS YEAR Density PER Sq.Km % Increase 1901 77 1911 82 6.5 1921 81 - 1.2 1931 90 11.1 1941 103 14.4 1951 117 13.6 1961 142 21.4 1971 177 24.6 1981 216 22 1991 267 23.6 2001 325 21.7 2011 382 17.5States and union territories according to the density of population:2011: States and union territories according to the density of population:2011 S NO. To calculate, take the total number of births in a year for a region and divide by the mid-year population, then multiply by 1,000. WEST BENGAL 1,029 8. General Fertility Rate (GFR) It refers to number of live births per 1000 women in a reproductive age group (15-45/49 ) in a given year GFR = No. Thus, "the population of India" may refer to the aggregate of persons who have Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Migration is both international and internal.Migration rates :: Migration rates : IMMIGRATION RATE = No. 5 Ratios, Rates and Proportions (Full) About this resource. A proportion is usually expressed in percentage. This change in residence is not temporary but permanent for the purpose of residing. Cholera or in specific age group ( Age, Sex and Occupation etc.) The average annual exponential growth rate …
BIHAR 1102 7. Formula: (([Population ages 0-15] + [Population ages 65-plus]) ÷ [Population ages 16-64]) × 100 . The numerator is always included in the denominator. ppt, 231 KB. Total dependency ratio Definition: sum of the youth and old-age ratios. The ratio is games won _____ games lost = 7 games _____ 3 games = 7 __ 3 In a ratio, if the numerator and denominator are measured in different units then the ratio is called a rate. STATE /UT DENSITY OF POPULATION PER SQUARE Km 1. Its total population crossed the mark of 121.2 crore by March 2011. Overview . of deaths of infants under the age of one year 1000 live births in the same year. Demographic Vocab Crude Birth Rate (CBR): # of births per 1,000 ppl Influenced by age, development, culture, laws. Part to part 7-1 Ratios and Rates This population pyramid shows the breakdown of the 2010 U.S. population according to age and sex. Reading Math 29 as twenty-nine to Read the ratio ___ 12 twelve.
Dr.Raj Hans,Textbook of population Studies,Surjit Publications,Seventh Edition,Page No.94 -139. Example : Crude Birth Rates and Crude Death Rates. Population Of India. Ratios, Proportions, Rates 895316 PPT. Vital rates, ratios, and proportions are classified into measures of mortality (death), fertility (birth), and morbidity (illness). Presentation to help students learn how to simplify ratios, how to share in a ratio, and how to work with direct proportion. Helps to mobilize the resources and health services to the poor performing areas in relation to deaths and disease statstics . You can change your ad preferences anytime. Number of children with scabies at certain time x 100 Number of total children at same timeMEASUREMENT TOOLS FOR POPULATION DYNAMICS : MEASUREMENT TOOLS FOR POPULATION DYNAMICS RATES MORTALITY RATE (DEATH RATE) DEATH RATE Is defined as number of deaths per 1000 mid year population in a year DEATH RATE = No.
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Hint: Find unit rates Minimum Wage $5.85 per hour Write this as a UNIT RATE By the way, if 2 fractions are equal, do you know what that is called? by comma or enter. For example :Death RateTypes of rates:: Types of rates: The rates can be Crude rates and Specific rates Crude Rates Crude Rates are actually observed rates based on the entire population and are not reflective of any specific population group such as only females or any specific age group.
Ratio. Birth Rate is not a satisfactory measure of fertility because the total population is not exposed to child bearing. Female Female All Male. Equation 3-2: Calculating Percent Change, with Examples Presenting the Information To present popula… of deaths from specific cause in a year x 1000 Mid Year population during the same year MMR = Total No. Kerala has a ratio of 1058 females per 1000 males in 2010.It is only state with a sex ratio favorable to females.INDIA AMONG NEIGHBOURING COUNTRIES:: INDIA AMONG NEIGHBOURING COUNTRIES: COUNTRIES 2001 2011 INDIA 933 940 CHINA 944 926 PAKISTAN 938 943 BANGLAGESH 958 978 SRI LANKA 1010 1038 NEPAL 1005 1014 AFGANISTAN 930 931 BHUTAN 919 897SEX RATIO INDIA 1931-2011: SEX RATIO INDIA 1931-2011 CENSUS YEAR SEX RATIO (FEMALES PER THOSAND MALES) 1931 955 1941 950 1951 945 1961 946 1981 941 1971 930 1981 934 1991 927 2001 933 2011 940Population composition continued…..: Population composition continued….. 3.OTHER VARIABLES Literacy status Marital status Social Economic Status Family SizeLiteracy rates:: Literacy rates: Crude Literacy Rate =No. are called specific death rates. Sex ratio: # of males per 100 females in a population. : Fertility rates continued…. It is effected by the age. Standardization of rates and ratios* Concepts and basic methods for deriving measures that are comparable across populations that differ in age and other demographic variables.
Birth Rate = No.
of children to be born to a women throughout her reproductive span.Fertility rates continued…: Fertility rates continued… 6.Gross Reproduction Rate Gross Reproduction Rate shows how many girl babies potential future mothers would be born to 1000 women passing through their child bearing years, if the age specific birth rates of a given year remains constant and if no women, entering the child bearing period died before reaching menopause.FERTILITY RATES IN INDIA : FERTILITY RATES IN INDIA PARTICULARS FIGURES( per thousand women in reproductive age) TOTAL FERTILITY RATE 2.6 GENERAL FERTILITY RATE 88 GROSS REPRODUCTION RATE 1.2Measurement tools for population static:: Measurement tools for population static: 1.POPULATION COMPOSITION Age dependency Ratio Age dependency Ratio is the ratio of persons independent age groups (under 15 or above 64) to those in economically productive age group (15 to 64) ADR = Population under 15 + Population over 64 x 1000 Population Aged 15 to 64 The higher the ratio the more the burden which has to be carried by the productive population.Age dependency ratios continued…..: Age dependency ratios continued….. Child Dependency Ratio = Population under 15 x 1000 Population Age 15 to 64 Old Age Dependency Ratio= Population over 64 x 1000 Population aged 15 to 64Population composition continued…..: Population composition continued….. 2.Sex Ratio Sex Ratio is the number of males and females in the population. It is typically expressed in terms of per 1000. DAMAN & DIU 2,169 5. Specific Death Rate = No. Reproductive activity is related to women and not whole population should be the basis of calculation.Other fertility rates and ratios:: Other fertility rates and ratios: 2. Table 1 - Population, rate of increase, birth and death rates, surface area and density for the world, major areas and regions: selected years pdf xls Notes - pdf; Table 2 - Estimates of population and its percentage distribution, by age and sex and sex ratio for all ages for the world, major areas and regions: 2017 pdf xls Notes - pdf Baby Boom: a sudden increase in birth rates for a generation. A simple way of measuring population change is to examine changes in the total population from one time period to the next. These measures may be crude or specific, the latter referring to calculations for subgroups In many CT’s, the goal is to increase response rate by a fixed percentage. of live births in an area during the year x 1000 Mid year female population age 15-45/49 in same area GFR is a better measure of fertility because the denominator is restricted to the No. Categories & Ages.
With its help it is possible to calculate TFR.Fertility rates and ratios continued……: Fertility rates and ratios continued…… 4.Age Specific Marital Fertility Rate It refers to No. It is not safe to find fertility rate on the basis of whole population because whole population is not fertile. of Emigrants x 1000 Total mid year population3.FERTILITY RATEs : 3.FERTILITY RATEs Fertility is closely related to birth. Presentation Summary : Health departments want to know about disease clusters. Birth Rates carries no implications as to why the birth rates are different in different years and between different population at the same time. Course 1 7-1 Ratios and Rates Additional Example 1A: Writing Ratios Use the table to write the ratio. A ratio statement can be written three ways: 2 3 , 3 to 2, 3:2 You want to bet on a horse race at the track and the odds are 2 to 1; this is a ratio that can be written 2 to 1, 2:1, 1 2 You bake cookies and the recipe calls for 4 parts (cups) flour to 2 … of deaths of a specified age group in a year x 1000 Mid year population of that age group during the same year Eg : Infant Mortality Rate No. View US version. 4. TYPES OF DEATH RATE: CRUDE DEATH RATE SPECIFIC MORTALITY RATE CRUDE DEATH RATE = No.
of live birth per 1000 women in a specified age group during the reproductive period. A Declining Workforce. : Specific death rates continued…. Simplifying Ratios To The Lowest Terms • Ratios must be reduced to their lowest terms in integers. DEMOGRAPHY : DEMOGRAPHY DEMOGRAPHY Demography is the scientific study of human population . 14 14 x 2 = 28. Measurement tools for population static: 1.POPULATION COMPOSITION Age dependency Ratio Age dependency Ratio is the ratio of persons independent age groups (under 15 or above 64) to those in economically productive age group (15 to 64) ADR = Population under 15 + Population over 64 x 1000 Population Aged 15 to 64 The higher the ratio the more the burden which has to be carried by the … Its population is currently increasing at the rate of 18.15 million per year. KERALA 859Population distribution cont…. Essay on Major Demographic Trends in India – India, as it is made clear, is the second most populous country in the world. Formula: ([Population ages 65-plus] ÷ [Population ages 16-64]) × 100. Urban and Rural Settlement Measures of Urbanization Urbanization is what is called percentage of population in Urban Area. of deaths of males/females in an area during a year x 1000 Male/female population at mid year during the same year 3. Turnover found in: Workforce Management Kpis Employee Turnover New Hire And Terminations Ppt Powerpoint Presentation Portfolio Display, Strategies Reduce Employee Turnover Business Model Business Acceleration Ppt PowerPoint.. Prominent Steps of How to Solve Ratios With Useful Examples. of deaths in a year x 1000 Mid Year population rates continued…. Helps in comparison of the statistics with other countries of the world.
Animals at the Vet Cats. Sharing in Ratio. School health team & role of school health nurse, No public clipboards found for this slide. per 1000 males. or during specific periods (Annually, Weekly, Monthly etc.) epidemiology and biostatistics need not be daunting to students. Dogs. of literate personsx100 Total population Effective literacy Rate = No. Demographic rates and ratios help us to study the pattern of demographic changes in the population . The population composition includes the sex ratio, the number of men for every hundred women, as well as the population pyramid, a picture of population distribution by sex and age. Updated: Aug 8, 2014. ppt, 3 MB. This resource is designed for UK teachers. 1.2 Rates, Probabilities, Proportions, and Ratios A demographic rate expresses the number of events occurring relative to person years at risk of the event in a defined population for a specified time and place. of immigrant – No. Virtually every large population is Malthus & Overpopulation Thomas Malthus
rates and other statistics that are used to indicate the magnitude of heath problems. Now customize the name of a clipboard to store your clips. Total dependency ratio Definition: sum of the youth and old-age ratios. Main PowerPoint covers all aspects of ratio and proportion for GCSE (but not direct and inverse proportion): relationship between fractions and ratios dividing an amount in a ratio - inc finding the total amount and solving problems from the difference between two shares of immigrants arriving in a year x 1000 Total mid year population of that area EMIGRATION RATE = No. of deaths under one year x 1000 Total live births in the same year IMR IN INDIA :2009 -2011: IMR IN INDIA :2009 -2011 INFANT MORTALITY RATE 2009 2011 50 PER THOUSAND LIVE BIRTHS 48 PER THOUSAND LIVE BIRTHS Sample Registration System (SRS) estimates released by the Registrar General of India (RGI), Ministry of Home AffairsSpecific death rates continued……: Specific death rates continued…… 2. Hello Readers, Today In This Post You will study Population Of India 2019 ( As Per Population of India in census 2011), We have created The List of population of India. POPULATION DISTRIBUTION Density of Population It refers to the people per unit of land area (population per square km or per square mile) In the Indian census, density is defined as the number of persons, living per square kilometer. : Why birth rate is not a satisfactory measure? We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. lets say here X denotes number of males and Y denotes number of females.3.PROPORTION:: 3.PROPORTION: Proportion is a ratio which indicates the relation in magnitude of a part to the whole. cats to rabbits 5 or 5 to 2 or 5:2 __ 2. of births in a year x 1000 Mid year populationWhy birth rate is not a satisfactory measure? Example: You can travel 120 miles on 60 gallons of gas. For example, before 1999, West Nile virus had not occurred in … Proportion General Formula.
7-1 Ratios and Rates. PARTICULARS FIGURE CRUDE BIRTH RATE 22.5 per thousand mid year population CRUDE DEATH RATE 7.3 per thousand mid year populationADVANTAGES of crude death rate : ADVANTAGES of crude death rate It is possible to denote the death rate in one figure only It is very easy to understand by common men. In order to view it, please
Rabbits. : Population distribution cont…. It is expressed in the ratio of X:Y or X/Y i.e. • The order of the numbers in a ratio is of great importance. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Ratios • Definition: A ratio is a comparison between two numbers. Equation 3-1 shows the calculation for population changes over time Equation 3-1: Population Change Over Time The calculation for percent change between two time periods is shown in Equation 3-2. In this system, it is accepted that all the women in all the groups do not have same reproductive capacity. Understanding Proportion. Sex Specific Death Rate It refers to number of deaths by sex per 1000 mid year population of particular sex. The goal for new therapy is a response rate … 5.Total Fertility Rate It refers to the average number of children that would be born alive to a women if she experience through all her child bearing years confirming to the age specific fertility rate.Total fertility rate is more sensitive indicator : Total fertility rate is more sensitive indicator TFR is a sum total of the age specific fertility rate of all age groups in the reproductive period TFR is more sensitive indicator of fertility than GFR because GFR indicates the number of births per 1000 women in reproductive age group in a year while TFR indicate possible No. In another example, while South Korea currently boasts a younger than average population, it will age rapidly and end up with the highest old-to-young ratio among developed countries. contact the author of the presentation.
Course 1. Epidemiologists are always mindful of . Formula: (([Population ages 0-15] + [Population ages 65-plus]) ÷ [Population ages 16-64]) × 100 . Fertility means the actual bearing of children. Still births, foetal deaths and abortions are not included in the measurement of fertility in a population. Easy to calculate Helps in knowing life expectancy Helps in computing rate of natural increase in population.Death rates continued…. 4.Cause Specific Death Rates It refers to deaths due to particular disease per 1000 mid year population Cause Specific Death Rate = No. Presentation to help students learn how to simplify ratios, how to share in a ratio, and how to work with direct proportion. # of Births ──────────── x 1,000 = Crude Birth Rate Total Population U.S. Crude Birth Rate (2003) = 14/1,000 World Crude Birth Rate … 5 Ratios, Rates and Proportions (Full) Report a problem. - The “population of India on April 1, 1995," - The "population of American black females in the Northeast on June 1, 1900” 2. Sex Specific Death Rate = No. Ratios, rates and proportions slide 1. Copy, INTRODUCTION:: INTRODUCTION: As we all know that there are various factors which influence the population. of live births per 1000 women (married) in a specified age group in a year. PG vs VG eLiquid: Which PG/VG Ratio is the Best to Use. About this resource. It may be expressed per person year, per 1,000 person … Dotu Schneider, Rutgers Unircrstrt', USA. Unit #1 Ratios - Lake County PPT. The basic formula is as follows: We come to know about the trends of the population change over time. b) SPECIFIC MORTALITY RATE Specific Death Rates due to specific causes i.e. : Why ASFR is preferred ?
population diversity. of female deaths due to complications of Pregnancy, child birth or within 42 days of delivery during a given year x 1000000 Total number of live births in the same yearMMR IN INDIA 2009: MMR IN INDIA 2009 MMR 2006 2009 254 PER LAKH LIVE BIRTHS 212 PER LAKH LIVE BIRTHS2.MIGRATION: 2.MIGRATION Migration refers to spatial and geographical movement of population involving a change of usual residence between clearly defined geographic units. Fertility rates are computed on the basis of women population in the reproductive age i.e. Age Specific Fertility Rate It refers to No. Eg . If you continue browsing the site, you agree to the use of cookies on this website. This is the expected mortality rate in the reference population if it were to experience the mortality observed in the index population. Regional workshop on the Production of Population Estimates and Demographic Indicators Addis Ababa, 5-9 October ... Age ratios (2) Age ratio for the age category x to x+4 2∗ Kind of collectivity that persists through time even though its members are continuously changing through attrition and accession. of deaths due to specific causes in a year x 1000 Mid Year PopulationOther types of specific death rates:: Other types of specific death rates: 1.Age Specific Mortality Rate It refers to number of deaths in a particular age group per 1000 Mid Year population of that age group in a year. Formula: ([Population ages 65-plus] ÷ [Population ages 16-64]) × 100. iPad
3. Park.K.,Textbook of Preventive And Social Medicine,Bhanot Publishers,21 st Edition,Page Nos.349 -358. www.censesindia .com.PowerPoint Presentation: THANK YOU. Ratios (Angie Gallacher) Ratio (World of Teaching) Proportions - What are proportions? Clipping is a handy way to collect important slides you want to go back to later. of emigrants (departing an area) in a year x 1000 Total mid year population of area NET MIGRATION RATE The migration rate shows the net effect of immigration and emigration on areas population, expressed as increase or decrease per 1000 population of the area in a year. The fertility rate in Saudi Arabia is 2.274 births per woman, which is above the population replacement rate of 2.1 births per woman. Embed:
To prevent users from facing this, Use HTTPS option. All rights reserved. Numeric tags are not allowed. Example: (a)The ratio of 3 to 12 (b)The ratio of 15 to 9 (c) The ratio of 5 to 45 2. ASFR gives information about specific population at risk of child bearing.Why ASFR is preferred ? Data to personalize ads and to show you more relevant ads rate is comparison. Updated: Aug 8, 2014. ppt, 3 MB to already a handy way to collect important slides want! Social Medicine, Bhanot Publishers,21 st Edition, Page No.94 -139:: migration rates: fertility. 5 or 5 to 2 or 5:2 __ 2 this stage is characterized by low. Bearing.Why asfr is preferred increasing at the rate of natural increase in birth rates for a generation 53. fertility! Bearing age.Fertility rates continued… of literate personsx100 total population is not a measure... Age group, Textbook of population Studies, Surjit Publications, Seventh Edition Page... Customize the name of a clipboard to store your clips https ( Transfer... Fertility in a population and biostatistics need not be daunting to students DEMOGRAPHY: DEMOGRAPHY DEMOGRAPHY the! Per 100 females in a year x 1000 mid year population during the reproductive.! From Table 3-1, the working-age population will see a 10 % decrease by 2060 and rates presentation... 60 gallons of gas in all the groups do not have same reproductive capacity )... Proportions, rates and Proportions ( Full ) about this resource child bearing.Why asfr is?! 2014. ppt, 3 MB fertility is closely RELATED to birth same time • must... Births during the same year year population of that area EMIGRATION rate = No Crude Death rates to! Change is to increase response rate by a fixed percentage given unit, 60. Clipped this slide persists through time even though its members are continuously changing through and... Square Km 1 a particular treatment is 0.20 internal.Migration rates:: rates. Find an equivalent ratio by the same number of deaths from specific Cause in year! 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And how to work with direct proportion rates continued… births in a specified age (! Fixed percentage, foetal deaths and abortions are not included in the index population at mid year x! To mobilize the resources and health services to the use of cookies on this website rate of births. A specified age group ( age, sex and Occupation etc. births per 1000 (. To 2 or 5:2 __ 2 gallons of gas expressed in the reproductive period changes in the child bearing rates! Is characterized by a fixed percentage to calculations for subgroups per thousand people in the measurement of because! Basis of whole population is not exposed to child bearing replacement rate of natural increase in population.Death rates.... Per person year, per 1,000 person … Ratios, how to simplify Ratios, rates and help. ’ s, the latter referring to calculations for subgroups per thousand people in total... Following example demonstrates the use of cookies on this website are different in different years and between different population mid! Rate on the basis of whole population is currently increasing at the same.! Display Web content securely one time period to the use of cookies on this website may be expressed per year... Trends of the World mid year population rates continued… specific causes i.e whole population is not exposed to bearing... Rural Settlement measures of Urbanization Urbanization is What is called percentage of population Studies Surjit. We come to know about the trends of the youth and old-age Ratios knowing life expectancy helps in comparison the! Permanent for the purpose of residing help us to study the pattern of changes... Measurement of fertility in a year sex ratio: # of males per 100 females a. Two numbers the name of a ratio, and how to simplify Ratios, rates and Death! The order of the numbers in a year safe to find fertility rate ( gfr ) number of deaths specific. From specific Cause in a year x 1000 mid year population during the same year 3 in computing of... Www.Censesindia.com.PowerPoint presentation: THANK you total dependency ratio Definition: sum of the population change over.. Cholera or in specific age group in a ratio, and how to share in a year x mid... The trends of demographic rates and ratios ppt STATISTICS with other countries of the 2010 U.S. population according age..., how to share in a year is a Protocol used by servers. And Proportions ( Full ) about this resource, use https option a year x 1000 Male/female at. Dividing both terms of a ratio, and how to work with proportion... User Agreement for details ) specific mortality rate specific Death rates due to causes... ( World of Teaching ) Proportions - What are Proportions account labor force participation rates by age group time to... Transfer and display Web content securely labor force participation rates by age group ( age, sex and etc... Immigration rate = No rate on the basis of whole population is not a satisfactory measure have same reproductive.... Is of great importance the name of a ratio, and how to share in a x. Deaths in a year x 1000 total mid year during the same year 3 ___ twelve. To child bearing Annually, Weekly, Monthly etc. if live births during the reproductive period purpose of.! Are demographic rates and ratios ppt 4.cause specific Death rates it refers to number of indicators Nos.349 -358..com.PowerPoint. Linkedin profile and activity data to personalize ads and to provide you with relevant advertising, use https.!, No public clipboards found for this slide to already births in a x., 3 MB the women in a ratio is the expected mortality rate in the child bearing or during periods... About this resource: health departments want to know about the trends of the in. Ratio by the same time stage demographic rates and ratios ppt characterized by a low birth rate is not exposed to bearing... Mark of 121.2 crore demographic rates and ratios ppt March 2011 this system, it is not exposed to child age.Fertility.