In which of the following situations does the rule for sample means not apply?
A)A pollster takes a random sample of 1,000 Americans and asks them to give their opinion of the President on a scale from 1 (completely disapprove) to 100 (completely approve).He is interested in the average rating.
B)You take a random sample of 20 students' scores from the ACT exam and record the average score.Assume ACT scores are bell-shaped.
C)A sports fan takes a random sample of 20 NBA players and records their salaries.He wants to estimate the average salary for the entire NBA.
D)The rule for sample means does not apply in any of these situations.

Question

Quizplus · Accepted Answer

The rule for sample means may not apply in situation C because the sample size is small (n=20) and salaries are often not normally distributed, potentially skewing the results.

In Which of the Following Situations Does the Rule for Sample