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Mathematics, 18.08.2021 18:30 jrynokenna

Based on a random sample of 13 tire changes, the mean time to change a tire on a Boeing 777 has a mean of 59.5 minutes with a standard deviation of 8.4 minutes. For 10 tire changes on a Boeing 787, the mean time was 64.3 minutes with a standard deviation of 12.4 minutes. To test for equal variances in a two-tailed test at α = 0.10, the critical values are: a. 3.73 and 0.228
b. 2.51 and 3.67
c. 3.07 and 0.398
d. 3.07 and 0.357

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