question archive A metropolitan transportation authority has set a bus mechanical reliability goal of 3,800 bus miles
A metropolitan transportation authority has set a bus mechanical reliability goal of 3,800 bus miles
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A metropolitan transportation authority has set a bus mechanical reliability goal of 3,800 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 3,825 bus miles and a sample standard deviation of 175 bus miles. Complete parts? (a) and? (b) below.
a. Is there evidence that the population mean bus miles is more than 3,800 bus? miles? (Use a 0.10 level of? significance.)
b. Determine the? p-value and interpret its meaning.
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