Which of the Following Statements Is True About a Stratified

question 23

Multiple Choice

Which of the following statements is true about a stratified sampling plan?

• A)In stratified sampling, objects in the same stratum are as varied as possible.
• B)Members of the same stratum are likely to respond the same, which leads to results with lower variability.
• C)In stratified sampling, several strata are randomly selected and data is collected on every member of the selected strata.
• D)Stratified sampling works best when objects are received in sequence during a specific time period and the characteristic of interest can be reasonably assumed to be randomly mixed during
• The time period in which the data will be collected.

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Definitions:

Confidence Interval

A set of numbers resulting from the statistical examination of a sample, expected to encompass the value of an undetermined parameter of the overall population.

Critical Values

Specific points on the scale of a test statistic that delineate the boundary between rejecting and not rejecting the null hypothesis.

Independent Large Samples

This refers to samples that are drawn from populations in such a way that the selection of a unit in one sample does not influence the selection of units in other samples, and each sample contains a sufficiently large number of observations.

Population Standard Deviations

The square root of the population variance, indicating how data is dispersed around the mean.