Use the accompanying 200 Los Angeles commute times to test the claim that the mean Los Angeles commute time is less than 31 minutes. Assume that a simple random sample has been selected. Use a 0.10 significance level. Compare the sample mean to the claimed mean of 31

minutes. Is the difference between those two values statistically? significant?

Reported daily commute times? (minutes) to work from workers of age 16 and older in Los Angeles. Data are from the U.S. Census? Bureau's 2017 American Community Survey.

30 20 15 15 8 30 25 7 20 30 60 30 10 20 5 25 30 60 40 45 10 15 30 10 28 30 10 30 10 28 15 30 35 45 20 30 20 10 30 20 45 60 25 20 20 70 25 15 30 30 141 30 27 30 70 5 20 40 60 20 10 30 60 30 30 50 30 50 12 20 30 60 10 10 25 30 20 50 15 25 15 30 15 10 10 20 30 30 30 15 45 40 25 20 45 5 10 40 15 10 15 60 30 20 20 25 15 42 20 45 40 60 15 20 5 70 30 20 45 60 45 35 20 15 30 30 45 45 1 20 20 40 60 25 10 10 20 30 15 30 20 45 30 15 25 45 15 30 50 60 60 20 30 10 5 15 40 20 2 30 20 75 40 30 20 40 60 30 8 5 60 15 10 15 75 6 60 10 15 5 40 15 15 50 12 25 25 30 10 45 15 45 10 30 30 60 30 45 30 15

Identify the null and alternative hypotheses. (Type integers or decimals. Do not? round.)

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