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  3. 15 in an examination of holiday spending known to

15 In an examination of holiday spending known to be normally distributed of a sample...

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Calculus

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15 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

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