Question

two classes were given identical quizzes. class a had a mean score of 7.3 and a standard deviation of 0.9. class b had a mean score of 8.7 and a standard deviation of 0.6. which class scored better on average? which class had more consistent scores?

Explanation:

Step1: Compare mean scores

The mean of Class A is 7.3 and of Class B is 8.7. Since 8.7 > 7.3, Class B has a higher average score.

Step2: Compare standard - deviations

The standard deviation measures the spread of data. A lower standard deviation means more consistent scores. Class A has a standard deviation of 0.9 and Class B has a standard deviation of 0.6. Since 0.6 < 0.9, Class B has more consistent scores.

Answer:

Which class scored better on average? Class B
Which class had more consistent scores? Class B