Mathematics, 25.11.2021 14:00 Mariefritz13

The management of a supermarket wants to adopt a new policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. The expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $80 and a standard deviation of $18. If the management wants to give free gifts to at most 8% of the customers, what should be the amount be above which a customer would receive a free gift?

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The management of a supermarket wants to adopt a new policy of giving a free gift to every customer...