2. A company has been rating television programs for more than 60 years. It uses

Question

2. A company has been rating television programs for more than 60 years. It uses several sampling procedures, but its main one is to track the viewing patterns of 20, 000 households. These contain more than 45, 000 people and are chosen to form a cross section of the overall population. The households represent various locations, ethnic groups, and income brack- ets. The data gathered from the sample of 20, 000 households are used to draw inferences States. Name two strata used in the sample. Explain your answer. the population of all households in the United

Explanation / Answer

The various locations, ethnic groups, and income brackets that are represented is the strata

because -Stratified sampling ensures that each segment of the population is represented.

Stratified sampling refers to a type of samplingmethod . With stratified sampling, the researcher divides the population into separate groups, called strata. Then, a probability sample (often a simple random sample ) is drawn from each group.

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