QuestionWhat does a standard deviation of 13 in exam scores mean? a. Scores are within 13 points of the mean. b. Highest and lowest scores differ by 13 points. c. Scores vary by 13 points. d. Scores vary from the mean by 13 points.

Studdy Solution
So, the standard deviation of13 means that the scores typically vary from the mean by13 points.Therefore, the correct interpretation of the standard deviation value isd. The exam scores typically vary from the mean by13 points.