Mathematics, 09.09.2020 20:01 marian987

The time required for an automotive center to complete an oil change service on an automobile approximately follows a normaldistribution, with a mean of 1717 minutes and a standard deviation of 2.52.5 minutes. (a) The automotive center guarantees customers that the service will take no longer than 2020 minutes. If it does take longer, the customer will receive the service forhalf-price. What percent of customers receive the service forhalf-price?
(b) If the automotive center does not want to give the discount to more than 33% of its customers, how long should it make the guaranteed time limit?

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The time required for an automotive center to complete an oil change service on an automobile approx...