Question

In order to determine attitudes about the Medicare Drug Plan, a random sample is drawn from each of four age groups so that each age group (65–70, 70–75, 75–80, 80–85) is represented in proportion to its percentage in the population. The researcher is using

Select one:

a. a systematic sample.

b. a cluster sample.

c. a simple random sample.

d. a stratified random sample.

Answer 1

In order to determine attitudes about the Medicare Drug Plan, a random sample is drawn from each of four age groups so that each age group (65–70, 70–75, 75–80, 80–85) is represented in proportion to its percentage in the population. The researcher is using

Select one:

a. a systematic sample.

b. a cluster sample.

c. a simple random sample.

Answer: d. a stratified random sample.

Note:

Stratified random sampling is a method of sampling that involves the division of a population into smaller groups known as strata. In our case , the strata are formed based on members' age group. A simple random sample should be taken from each stratum.