A test of spelling ability is given to a random sample of 10 students before and after they completed a spelling course.The mean score before the course was 119.60 and after the course the mean score was 130.80.The standard deviation of the difference was 16.061.What do you conclude at $\alpha$ = .01?
A)No evidence of a difference
B)Significant difference in the scores

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The Answer of A test of spelling ability is given to a random sample of 10 students before and after they completed a spelling course.The mean score before the course was 119.60 and after the course the mean score was 130.80.The standard deviation of the difference was 16.061.What do you conclude at $\alpha$ = .01?
A)No evidence of a difference
B)Significant difference in the scores

A Test of Spelling Ability Is Given to a Random α\alphaα

A Test of Spelling Ability Is Given to a Random $\alpha$