Mathematics, 11.10.2019 04:00, maddy121209

The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with a mean of 19 minutes and a standard deviation of 3 minutes. (a) the automotive center guarantees customers that the service will take no longer than 20 minutes. if it does take longer, the customer will receive the service for half-price. what percent of customers receive the service for half-price? (b) if the automotive center does not want to give the discount to more than 2% 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...