1a) Overtime Hours WorkedA random sample of15registered nurses in a large hospital showed that they worked on average44.6

hours perweek.The standard deviation of the sample was2.6.Estimate the mean of the population with99% confidence.Assume the variable is normallydistributed.Round intermediate answers to at least three decimalplaces.Round your final answers to one decimalplace.

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1b)Weights of ElephantsA sample of7 adult elephants had an average weight of11,701 pounds.The standard deviation for the sample was22

pounds.Find the99 % confidence interval of the population mean for the weights of adultelephants.Assume the variable is normallydistributed.Round intermediate answers to at least three decimalplaces.Round your final answers to the nearest wholenumber.

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