Question

A class of 30 introductory statistics students took a quiz worth 100 points. the standard deviation of the scores was 0. what must be true about the students' scores?

Answer 1

This means that everybody answered the same number of items. This means that every data value is equal to the mean. This outcome permits us to say that the sample standard deviation of a data set is zero if and only if all of its values are same or identical.

Answer 2

The answer is that all the scores are the same