Question

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 brackets. The data gathered from the sample of​ 20,000 households are used to draw inferences about the population of all households in the United States. Complete parts​ (a) and​ (b) below. What strata are used in the​ sample? Choose the correct answer below.
A. The various​ locations, ethnic​ groups, and income brackets that are represented
B. The various sampling procedures and viewing patterns
C. The number of households and people that are chosen
D. The television ratings
Why is it important to have a stratified sample for these​ ratings? Choose the correct answer below.
A. Stratified sampling ensures that all of the members of one or more groups are used.
B. Stratified sampling ensures that the television ratings are accurate.
C. Stratified sampling ensures that each segment of the population is represented.
D. Stratified sampling ensures that only households in the U.S. are sampled

Answer 1

Using stratified sampling concepts, it is found that the correct options are:

• A. The various​ locations, ethnic​ groups, and income brackets that are represented

• C. Stratified sampling ensures that each segment of the population is represented.

Stratified sampling divides the population into groups, called stratas, and a few elements of each group are surveyed.

In this problem, the households are divided to represents various​ locations, ethnic​ groups, and income brackets, hence, those are the stratas.

Stratified sampling is used because ensures that all segments of the population are represented.

You can learn more about stratified sampling at https://brainly.com/question/16252312