Question: Has to do with the problem . ttest Score, by (Group) Two-sample t test with equal variances Group Obs Mean Std. Err. Std. Dev. [95%

Has to do with the problem

. ttest Score, by (Group) Two-sample t test with equal variances Group Obs Mean Std. Err. Std. Dev. [95% Conf. Interval] 40 17.1 . 8342047 5.275974 15 . 41266 18. 78734 35 19. 82857 1 . 181429 6. 989428 17 . 42762 22 . 22952 combined 75 18.37333 . 7210536 6. 244507 16.9366 19.81006 diff -2. 728571 1 . 419713 -5. 558056 . 100913

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