If behavior problem scores are normally distributed, and we want to say something meaningful about what values are likely and what are unlikely, we would have to know
A) the mean.
B) the standard deviation.
C) the sample size.
D) both a and b

Question

Quizplus · Accepted Answer

In order to describe the likelihood of values on a normally distributed scale, both the mean and standard deviation are necessary. The sample size can affect the precision of these measures, but is not necessary for understanding the general pattern of the distribution. Therefore, choice D (both a and b) is the best answer.

If Behavior Problem Scores Are Normally Distributed, and We Want