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A random sample of 91 observations produced a mean x= 26.1 and a standard deviation s = 2.8. a. Find a 95% confidence interval for

A random sample of 91 observations produced a mean x= 26.1 and a standard deviation s = 2.8. a. Find a 95% confidence interval for p. b. Find a 90% confidence interval for p. c. Find a 99% confidence interval for u

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