An automobile manufacturer claims that a particular model gets 28 miles to the gallon. The

Question

Environmental Pollution Agency, using a sample of 49 automobiles of this model, finds the sample
mean to be 26.8 miles per gallon. From previous studies, the population standard deviation is known
to be 5 miles per gallon. Could we reasonably expect (within 2 standard errors) that we could select
such a sample if indeed the population mean is actually 28 miles per gallon?

Answer 1

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