A stratified random sample should be used when
a. the population has identifiable subgroups that are of interest to the researcher
b. the sample constitutes the population.
c. the population is very small
d. there is no way of estimating the probability that a particular subgroup will be included in the sample
Question 2
The first step in sampling is to
a. determine the desired size of the sample
b. identify the population from which the sample is to be drawn
c. identify all subgroups, or strata
d. identify desired attributes of the sample
A genetic bottleneck reduces a population temporarily to very low levels, removing much of its genet
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World Population Growth, Past 10,000 years
Bell Curve for Intelligence IQ scores for a population-based sample usually fall into this kind of
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The Solow Model Incorporating Population Growth