According to a national survey, the average commuting time for people who commute to work is 19.0 minutes. Suppose a researcher wants to test this claim. Taking a random sample of 20 commuters, the researcher calculates a mean time of 19.346 minutes and a standard deviation of 2.842 minutes.
-How would you define the rejection region for this test at ? = .10?

Question

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For a two-tailed test at the 0.10 significance level with 19 degrees of freedom (n-1 = 20-1), the critical t-values are approximately ±1.729. This defines the rejection region for values of t that are either greater than 1.729 or less than -1.729.

According to a National Survey, the Average Commuting Time for People