A statistician adds all of the test scores for a group of participants and then divides the sum by the number of participants. The result of his calculation is the ____________ of the test scores.
A) arithmetic mean
B) effect size
C) p value
D) standard deviation

Question

Quizplus · Accepted Answer

The formula for calculating the arithmetic mean, also known as the average, is adding up all the data points and then dividing the total by the number of data points. This is what the statistician is doing in the scenario described, so the answer is A. Effect size, p value, and standard deviation are all different statistical concepts and are not relevant to this scenario.

A Statistician Adds All of the Test Scores for a Group