Question

two classes were given identical quizzes.
class a had a mean score of 7.7 and a standard deviation of 0.8
class b had a mean score of 7.4 and a standard deviation of 1.1
which class scored better on average? select an answer
which class had more consistent scores? select an answer
question help: video

Explanation:

Step1: Compare mean scores

The mean represents the average. Since \(7.7>7.4\), Class A has a higher average score.

Step2: Compare standard deviations

Standard deviation measures consistency. A lower standard deviation (\(0.8 < 1.1\)) means more consistent scores. So Class A has more consistent scores.

Answer:

Class A scored better on average. Class A had more consistent scores.