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A study was conducted to estimate , the mean commute distance that all employed U.S. adults travel to work. Suppose a random sample of 49

A study was conducted to estimate , the mean commute distance that all employed U.S. adults travel to work. Suppose a random sample of 49 employed U.S. adults gives a mean commute distance of 22 miles and that from prior studies, the population standard deviation is assumed to be = 8.4 miles.

We are 95% confident that the mean commute distance to work of all employed U.S. adults falls between which of the following intervals?

18.4 to 25.65.2 to 38.819.6 to 24.420.8 to 23.2

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