The manufacturer of a new compact car claims the miles per gallon (mpg) measurement for the fuel economy is normally distributed with mean ?=26.7 mpg and standard deviation ?=7.5. a) What is the...


The manufacturer of a new compact car claims the miles per gallon (mpg) measurement for the fuel economy is normally distributed with mean ?=26.7 mpg and standard deviation ?=7.5.


a) What is the probability that one new compact car selected at random has a fuel economy of at least 24 mpg?


b) If 30 such cars are selected at random and tested, what is the probability their average mpg ?¯ is no more than 29 mpg?


Jun 02, 2022
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