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The mean score for Class 1 is (75+80+84+79+92+86+88+86+86+90)/10 = 84.6
The mean score for Class 2 is (83+85+91+93+72+85+76+80+82+89)/10 = 83.6
Based on the mean, Class 1 generally performed better on the math test as they had a higher mean score of 84.6 compared to Class 2's mean score of 83.6.