If a researcher believes that participants in a single group will score very differently from one another on a task,that researcher can find out if that is true by looking at the:
A) mean
B) median
C) correlation coefficient
D) standard deviation

Question

Quizplus · Accepted Answer

The standard deviation is the measure of variability in a group of scores. A high standard deviation indicates that the scores are spread out and therefore, participants in the group score differently from one another on the task. The mean and median are measures of central tendency, which do not provide information about variability. The correlation coefficient measures the relationship between two variables and is not relevant for testing if a single group scores differently from one another.

If a Researcher Believes That Participants in a Single Group