It is known that students participating in a typewriting course can write an average of 50 words per minute and the standard deviation is σ (sigma) = 4. At the end of the course, the averages for a...

It is known that students participating in a typewriting course can write an average of 50 words per minute and the standard deviation is σ (sigma) = 4. At the end of the course, the averages for a sample of 10 students were calculated as shown in the table below. Examine the hypothesis that the course is beneficial for students at the 5% significance level.

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