Use the following to answer the questions below:
In a given year, the average score on the Mathematics portion of the ACT for males was 21.3 with standard deviation 5.3. The average score on the Mathematics portion of the ACT for females was 20.2 with standard deviation 4.8.
-What effect does increasing the sample sizes have on the spread of the distribution?
A) It increases the spread of the distribution.
B) It decreases the spread of the distribution.
C) It has no effect on the spread of the distribution.

Question

Quizplus · Accepted Answer

Increasing the sample size decreases the spread of the distribution, as it reduces the standard error of the mean, leading to more precise estimates.

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