Mathematics, 13.10.2020 04:01 austin8535
Based on a random sample of 13 tire changes (n1), the mean time to change a tire on a Boeing 777 has a mean of 59.5 minutes with a standard deviation of 7.4 minutes. For 10 tire changes (n2) on a Boeing 787, the mean time was 64.3 minutes with a standard deviation of 13.2 minutes. In testing equal variances where we use a "two-tailed" F-test at α=0.1, the two critical values for the upper 5 percent and lower 5 percent rejection areas are:
a. 0.925
b. 0.561
c. 0.314
d. 0.143
Answers: 2
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Based on a random sample of 13 tire changes (n1), the mean time to change a tire on a Boeing 777 has...
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