5. Assume the miles-per-gallon of the model Q cars is distributed with a mean of 22 miles-per-gallon and a standard
deviation of 12 miles- per-gallbn. 36 model Q cars are sampled.
申論題內容
(A). What is the probability that mean miles-per-gallon of the 36 cars will get less than 21 miles-per-gallon?
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