A simple random sample with n 55 provided a sample mean of 27.5 and a sample standard deviation of 4.4. (Round your answ

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A Simple Random Sample With N 55 Provided A Sample Mean Of 27 5 And A Sample Standard Deviation Of 4 4 Round Your Answ 1 (21.34 KiB) Viewed 9 times

A simple random sample with n 55 provided a sample mean of 27.5 and a sample standard deviation of 4.4. (Round your answers to one decimal place.) (a) Develop a 90% confidence interval for the population mean.. 27.50 x to 29.49 X (b) Develop a 95% confidence interval for the population mean. 27.31 x to 29.68 (c) Develop a 99% confidence interval for the population mean. 26.91 x to 30.08 (d) What happens to the margin of error and the confidence interval as the confidence level is increased? As the confidence level increases, there is a smaller margin of error and a wider confidence interval. O As the confidence level increases, there is a larger margin of error and a more narrow confidence interval As the confidence level increases, there is a smaller margin of error and a more narrow confidence interval. As the confidence level increases, there is a larger margin of error and a wider confidence interval.