IGCSE Development Studies: Specimen Questions with Answers 35 - 36 of 98

Explanation

The fertility rate is not able to find out the rate of growth of population and mortality. The fertility rate is not able to provide the actual idea of the rate of population because they ignore the sex of newly born children and their mortality.

Gross reproduction rate measures the rate at which a new born female would. It shows the rate of at which mother’s would be replaced by daughters and old generation by the new. If no mother died or migrated before reaching the upper limit of child bearing age i. e. 15 - 49.

Explanation

• Stratified sampling: It divides the population by certain characteristics into different homogeneous strata (like, PhD students, masters, bachelors) . Elements in each stratum is homogeneous but are heterogeneous across. After selecting the strata, a simple random sampling or systematic random sampling is done on each stratum to the proportion of each strata.

• Quota Sampling: In quota sampling the population is first segmented into mutually exclusive sub-groups, as in stratified sampling. Then the judgement of the investigator is used in selecting the subjects or units from each segment in a proportion. E. g. Interview took sample of 200 females and 400 males between the age group 35 - 55.