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)
. Based on the mean, Class
generally performed better on the math test.
To find the mean score for each sample, we add up all the scores and divide by the number of students in each class.
Class 1 mean score:
(75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90) / 10 = 866 / 10 = 86.6
Class 2 mean score:
(83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89) / 10 = 846 / 10 = 84.6
Therefore, the mean score for Class 1 is 86.6 and the mean score for Class 2 is 84.6. Based on the mean score, Class 1 generally performed better on the math test than Class 2.