RESEARCH METHODS THINKING CRITICALLY WITH PSYCHOLOGICAL SCIENCE
THE SCIENTIFIC METHOD AND DESCRIPTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a random sample
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a sample in which the subgroups within a population are ignored
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a sample in which the subgroups within a population are proportionately represented
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a sample in which the effects of the stratosphere on people are measured
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Detailed explanation-1: -What is stratified sampling? In stratified sampling, researchers divide subjects into subgroups called strata based on characteristics that they share (e.g., race, gender, educational attainment). Once divided, each subgroup is randomly sampled using another probability sampling method.
Detailed explanation-2: -Stratified random sampling has numerous applications and benefits, such as studying population demographics and life expectancy. Stratified random sampling is also called proportional random sampling or quota random sampling.
Detailed explanation-3: -Proportionate stratified sample means that size of sample strata is proportional to the size of population strata; in other words, probability of unit being selected from the stratum is proportional to relative size of that stratum in population.
Detailed explanation-4: -In statistical surveys, when subpopulations within an overall population vary, it could be advantageous to sample each subpopulation (stratum) independently. Stratification is the process of dividing members of the population into homogeneous subgroups before sampling.
Detailed explanation-5: -Probability proportional sampling, usually known as probability proportional to size (PPS) sampling, is an unequal probability sampling technique, in which the probability of selection for each sampling unit in the population is proportional to an auxiliary variable.