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Suppose you have a sample of data, where and n = 25. You want to create...

Suppose you have a sample of data, where top enclose X space equals space 20 and n = 25. You want to create a 99% confidence interval for the mean. Assume the population standard deviation is 4.

a)What is the critical value for the confidence interval?  

b)What is the confidence interval? Round to 3 decimal places.

c)What is the critical value used for the confidence interval?

d)What is the margin of error used for the confidence interval? Round to 3 decmial places.

e)Fill in the confidence interval. Round to 3 decimal places.

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Answer #1

Given data, Sample size n=25 Mean of given sample K 20 Population Standard deviation a-4 Since sample size is small, use t-co

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