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

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.

:)

1 answer

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

Class 1 Scores: 75, 80, 84, 79, 92, 86, 88, 86, 86, 90

Calculating the mean: Sum of Class 1 Scores = 75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90 = 869

Mean for Class 1 = Total sum / Number of students = 869 / 10 = 86.9

Class 2 Scores: 83, 85, 91, 93, 72, 85, 76, 80, 82, 89

Calculating the mean: Sum of Class 2 Scores = 83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89 = 885

Mean for Class 2 = Total sum / Number of students = 885 / 10 = 88.5

Now we can summarize the results:

  • Mean for Class 1 = 86.9
  • Mean for Class 2 = 88.5

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

So the final answers are: The mean score for Class 1 is 86.9. The mean score for Class 2 is 88.5. Based on the mean, Class 2 generally performed better on the math test.