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A random sample of 88 observations produced a mean x= 25.6 and a standard deviation s= 2.8 . a. Find a 95% confidence interval for

A random sample of 88 observations produced a mean x=25.6 and a standard deviation s=2.8.

a. Find a 95% confidence interval for mu.

b. Find a 90% confidence interval for mu.

c. Find a 99% confidence interval for mu.

Use integers or decimals for any numbers in the expression. Round to two decimal places as needed.)

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