A company has been rating television program for more than 60 years. If uses sev

Question

A company has been rating television program for more than 60 years. If 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 represent values locations, ethnic groups, and income brackets. The data gathered from the sample of 20,000 households are used to draw inference about the population of all household, in the United States. Complete part (a) and (B) below What strata are used in the sample? Choose The correct answer below The number of households and people that are chosen The various locations ethnic groups and income brackets that are represented The television ratings The various sampling procedures and viewing patterns Why is it important to have a stratified sample for these ratings' Choose the correct answer below Stratified sampling ensures that each segment of the population is represented Stratified sampling ensures that the television ratings are accurate Stratified sampling ensures that all of the members of one or more groups are used Stratified sampling ensures that only households in the U S are sampled

Explanation / Answer

Solution:-

a) (B) The various locations, ethnic groups and income brackets that are represented.

b) (A) Stratified sampling ensures that each segment of the population is represented.

Stratified sampling refers to a type of sampling method . 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. Stratified sampling has several advantages over simple random sampling.

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