Question

A set of data has a mean of 74 and a standard deviation of 6. Which data value would be three standard deviations below the mean?

A. 72 B. 68 C. 56 D. 6

Answer 1

Answer: C. 56

Explanation:

This is a common statistical principle known as z-score. It calculates how many standard deviations away from the mean a data point is. In our case, 56 is 3 standard devs away from the mean, 74. And thats our answer! :)