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On a secondary school examination in mathematics, the mean grade of 32 boys was 72 with a standard deviation of 8, while the mean grade

On a secondary school examination in mathematics, the mean grade of 32 boys was 72 with a standard deviation of 8, while the mean grade of 36 girl was 75 with a standard deviation of 6. Test the hypothesis at a 0.01 level of significance that the girl are better in mathematics that the boys.

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