Business, 18.12.2019 01:31, ashl3yisbored

In an examination of purchasing patterns of shoppers, a sample of 20 shoppers revealed that they spent, on average, $54 per hour of shopping. based on previous years, the population standard deviation is thought to be $21 per hour of shopping. assuming that the amount spent per hour of shopping is normally distributed, find a 90% confidence interval for the mean amount.

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In an examination of purchasing patterns of shoppers, a sample of 20 shoppers revealed that they spe...