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You know that y is a normally distributed variable with a variance of 9. You do...

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Statistics

You know that y is a normally distributed variable witha variance of 9. You do not know its mean. You collect some data.For each sample below, form the 95% confidence interval and testthe null hypothesis of the mean equaling 2.

a. (8,1,5)

b. (8,1,5,-4,-8)

c. (8,1,5,-4,-8,4,8,5)

Answer & Explanation Solved by verified expert
4.2 Ratings (523 Votes)
We know the population Variance 2 9So Standard Deviation 3We need to find 95 confidence interval in each casezscore 196Null Hypotheses    See Answer
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