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The mean height of a random sample of 47 students who take part in athletic activities...

The mean height of a random sample of 47 students who take part in athletic activities at a College is 175cm with a standard deviation of 5cm while a random sample of 132 students who showed no interest in athletics had a mean of 170cm and a standard deviation of 7cm. (a) Construct a 99% confidence interval for the difference in the mean heights of the two groups of students. (b) Are students who take part in athletic activities taller? Test at the 1% level of significance

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Answer #1

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