Mathematics, 26.10.2019 01:43, bedsaul12345

The shape of the distribution of the time required to get an oil change at a 15-minute oil-change facility is unknown. however, records indicate that the mean time is 16.2 minutes, and the standard deviation is 3.4 minutes. suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. on a typical saturday, the oil-change facility will perform 40 oil changes between 10 a. m. and 12 p. m. treating this as a random sample, at what mean oil-change time would there be a 10% chance of being at or below? this will be the goal established by the manager.

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The shape of the distribution of the time required to get an oil change at a 15-minute oil-change fa...