Question

Kristen and Sam notice that the means of their scores for the first marking period were the same. Kristen commented that the standard deviation of her scores was 8.4 while the standard deviation of Sam's was 4.8. Which statement must be true?

Answer 1

A: Sam's scores were lower than Kristen's.
B: Sam's scores were more consistent than Kristen's.
C: Sam had more failing scores than Kristen.
D: Sam's median score was lower than Kristen's median score.

Answer 2

Standard deviation is a measure of how spread out the scores are.

So if Sam had a lower standard deviation, his scores were not as spread out as Kristen's.