Question

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

Step-by-step explanation:

12-Jun-2019 — Environmental protection Agency, using a sample of 49 automobiles of this model, finds the sample mean to be 26.8 miles per gallon