Here are the math test scores of 10 randomly selected students from Class 1 and Class 2.

Question

Class 1: 75 | 80 | 84 | 79 | 92 | 86 | 88 | 86 | 86 | 90
Class 2: 83 | 85 | 91 | 93 | 72 | 85 | 76 | 80 | 82 | 89
Find the mean score of each sample. Based on the mean, which class generally performed better on the math test?

The mean score for Class 1 is __. The mean score for Class 2 is __. Based on the mean, Class 1 generally performed better on the math test.

Answer 1

To find the mean score for each class, we sum the scores and then divide by the number of students.

Class 1 scores: 75 | 80 | 84 | 79 | 92 | 86 | 88 | 86 | 86 | 90

Sum of Class 1 scores = 75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90 = 879

Mean score for Class 1 = Total Sum / Number of Students = 879 / 10 = 87.9

Class 2 scores: 83 | 85 | 91 | 93 | 72 | 85 | 76 | 80 | 82 | 89

Sum of Class 2 scores = 83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89 = 885

Mean score for Class 2 = Total Sum / Number of Students = 885 / 10 = 88.5

Results:

• The mean score for Class 1 is 87.9.
• The mean score for Class 2 is 88.5.

Based on the mean, Class 2 generally performed better on the math test.