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A simple random sample of size n is drawn from a population that is normally distributed....

A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x̅, is found to be 107 , and the sample standard deviation, s, is found to be 10 .

(a) Construct a 98 % confidence interval about μ if the sample size, n, is 22 .

(b) Construct a 98 % confidence interval about μ if the sample size, n, is 12 .

(c) Construct a 95 % confidence interval about μ if the sample size, n, is 22 .

(d) Could we have computed the confidence intervals in parts (a)-(c) if the population had not been normally distributed?


(a) Construct a 98 % confidence interval about μ if the sample size, n, is 22 .


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An h= 22, ontiden e intenva for - a) 98 2.518 107 22 5.3684 107 by&98 7 40 112-4 Lower bound - 01. G 12.4 Opper buun = Scanne

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