Question

You and your colleague are designing a study to try to determine the ideal mean cost for a discretionary service. You will market your service to a very large population. Your colleague thinks you will get the best data if you take lots of small samples. You think the data will be more reliable if you take one or two very large samples.

A)You are equally wrong-unless you use stratified sampling, you cannot expect reliable results.
B):You are equally correct-there is little difference in the reliability of these sampling methods.
C)You are equally correct-there is little difference in the reliability of these sampling methods.
D)You are right-the means of a few large samples will yield more reliable results.

Answer 1

Answer: D. You are right the means of a few large samples will yield more reliable results.

Explanation: In designing a study to determine the ideal mean of cost for a discretionary service, the mean of a few large samples will yield more reliable results.

Large sample has a sample size of n greater or equal to 30, n means number of samples. Large sample size is considered important in research because large sample provide an accurate and reliable mean and small margin of error.