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You are given the sample mean and the population standard deviation. Use this information to construct the90% and95% confidence intervals for the population mean. Which

You are given the sample mean and the population standard deviation. Use this information to construct the90% and95% confidence intervals for the population mean. Which interval iswider?

A random sample of 38 gas grills has a mean price of $638.80. Assume the population standard deviation is $55.80.

90% = ( , )

95% = ( , )

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