A class of 30 introductory statistics students took a 15

Last updated: 7/12/2022

A class of 30 introductory statistics students took a 15 item quiz, with each item worth 1 point. The standard deviation for the resulting score distribution is 0. You know that: A. about half of the scores were above the mean. B. an arithmetic error must have been made. C. everyone correctly answered the same number of items. D. the mean, median, and mode must all be 0.