A random sample of 86 observations produced a mean x=25.4 and a standard deviation 5=2.6....
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A random sample of 86 observations produced a mean x=25.4 and a standard deviation 5=2.6. a. Find a 95% confidence interval for . b. Find a 90% confidence interval for . c. Find a 99% confidence interval for . a. The 95% confidence interval is (Use integers or decimals for any numbers in the expression. Round to two decimal places as needed.)
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