In an examination of holiday spending (known to be normally distributed)of a sample of 16 holiday shoppers at a local mall,an average of $54 was spent per hour of shopping.Based on the current sample,the standard deviation is equal to $21.Find a 90% confidence interval for the population mean level of spending per hour.
A) [$44.8335,$63.1665]
B) [$44.7967,$63.2033]
C) [$45.3637,$62.6363]
D) [$46,9597,$61.0403]

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The Answer of In an examination of holiday spending (known to be normally distributed)of a sample of 16 holiday shoppers at a local mall,an average of $54 was spent per hour of shopping.Based on the current sample,the standard deviation is equal to $21.Find a 90% confidence interval for the population mean level of spending per hour.
A) [$44.8335,$63.1665]
B) [$44.7967,$63.2033]
C) [$45.3637,$62.6363]
D) [$46,9597,$61.0403]

In an Examination of Holiday Spending (Known to Be Normally