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Find a 95 confidence interval for the mean total cost of

Question: Find a 95% confidence interval for the mean total cost of all customer orders. Then do this separately for each of the four regions. Create side-by-side box plots of total cost for the four regions. Does the positive skewness in these box plots invalidate the confidence interval procedure used?

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Basic Statistics: Find a 95 confidence interval for the mean total cost of

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