The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is mound-shaped and symmetric with a mean of 26.3 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested, what is the probability the average mpg achieved by these 30 cars will be greater than 28? Answer:
Added by Javier P.
Step 1
The formula for SE is standard deviation divided by the square root of the sample size. In this case, the standard deviation is 11.2 mpg and the sample size is 30 cars. So, SE = 11.2 / sqrt(30) = 2.04 mpg. Show more…
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