Question

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

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

Answer 1

To find the mean score of each sample, we add up all the scores and then divide by the number of students.

For Class 1:
(75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90) / 10 = 856 / 10 = 85.6

For Class 2:
(83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89) / 10 = 846 / 10 = 84.6

Therefore, the mean score for Class 1 is 85.6 and the mean score for Class 2 is 84.6. Based on the mean, Class 1 generally performed better on the math test.