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

This table displays 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? Express your answer as a decimal. Do not round your answer.

(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.
Sorry, that’s only partially correct

Compute the mean by adding the data values for Class 1 and dividing the sum by the number of values.
Compute the mean by adding the data values for Class 1 and dividing the sum by the number of values.

1 answer

To find the mean score for each class, we will add the scores of each class and then divide by the total number of students in that class.

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 = 909

Number of Students in Class 1: 10

Mean Score for Class 1: Mean (Class 1) = Total Score / Number of Students = 909 / 10 = 90.9

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

Number of Students in Class 2: 10

Mean Score for Class 2: Mean (Class 2) = Total Score / Number of Students = 885 / 10 = 88.5

Results:

  • The mean score for Class 1 is 90.9.
  • The mean score for Class 2 is 88.5.
  • Based on the mean, Class 1 generally performed better on the math test.