A metropolitan transportation authority has set a bus mechanical reliability goal of

3 comma 8003,800

bus miles. Bus mechanical reliability is measured specifically as the number of bus miles between mechanical road calls. Suppose a sample of

100100

buses resulted in a sample mean of

3 comma 8253,825

bus miles and a sample standard deviation of

225225

bus miles. Complete parts (a) and (b) below.

Find the test statistic for this hypothesis test.

t Subscript STATtSTATequals=enter your response here

(Round to two decimal places as needed.)