Question

Which statement about sampling is true? a-Strata are a means of equating the accessible population with...

Which statement about sampling is true?

a-Strata are a means of equating the accessible population with the target population.

b-There is less risk of sampling bias homogenous populations than in heterogenous populations.

c-The most basic units of a population are referred to as strata.

d-Samples that are not representative jeopardizes the study's statistical conclusion validity.

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Answer #1

Stratified sampling: It is an improvement over systematic method. In it the research divides his population in strata on the basis of some characteristics from each of these smaller homogenous groups (strata) the researcher draws at random a pre-determined number of units. Stratified sampling is a probability sampling technique wherein the researcher divides the entire population into different subgroups or strata. Samples is least likely to be representative of the overall population.

Correct statement: b-There is less risk of sampling bias homogenous populations than in heterogenous populations.

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