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A Random Sample of 82 Customers,who Visited a Department Store,spent

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A random sample of 82 customers,who visited a department store,spent an average of $71 at this store.Suppose the standard deviation of expenditures at this store is A random sample of 82 customers,who visited a department store,spent an average of $71 at this store.Suppose the standard deviation of expenditures at this store is = $19.The 98% confidence interval for the population mean (rounded to two decimal places)is: = $19.The 98% confidence interval for the population mean (rounded to two decimal places)is:

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