Question: A metropolitan transportation authority has set a bus mechanical reliability goal of 3,900 bus miles. Bus mechanical reliability is measured specifically as the number of

A metropolitan transportation authority has set a bus mechanical reliability goal of 3,900 bus miles. Bus mechanical reliability is measured specifically as the number of bus miles between mechanical road calls. Suppose a sample of 100 buses resulted in a sample mean of 3,950 bus miles and a sample standard deviation of 275 bus miles. Complete parts(a) and(b) below.

A) Is there evidence that the population mean bus miles is more than 3,900? (Use a .05 significance level)

Find the t-stat

The critical values is/are?

B) Determine the P-value and interpret its meaning

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