Computing random sample and confidence interval

Reference no: EM13105446

You are given the sample mean and the sample deviation, Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider?

A random sample of 38 gas grills has a mean price of $638.20 and a standard deviation of $59.80.

a) The 90% confidence interval is __,__ (round to two decimal places)

b) The 95% confidence interval is __,__ (round to two decimal places)

c) Which interval is wider? The 90% or 95% confidence interval? (choose one)

Reference no: EM13105446

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