The time required by Speedy Lube to complete an oil change service on an automobile follows approximately a normal distribution with a mean of 17 minutes and a standard deviation of 2.5 minutes. Let X represent the time required to complete an oil change service. Round all answers to three decimal places. (eg. 0.242 or 1.317) • Fill in the blanks: X-N(μ- • Speedy Lube guarantees 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 proportion of customers receive the service for half price? • The proportion of customers that receive the service for half price is (eg. 0.242) • If Speedy Lube does not want to give the discount to more than 3% of its customers, how long should it make the guaranteed time limit? o If Speedy Lube does not want to give the discount to more than 3% of its customers, it should make the guaranteed time limit minutes.

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