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.

Question content area bottom

Part 1

a. Is there evidence that the population mean bus miles is more than

3 comma 8003,800

bus miles? (Use a

0.050.05

level of significance.)

State the null and alternative hypotheses.

HSubscript0:

mu

not equals

equals=

greater than>

less than or equals

greater than or equals

less than<

enter your response here

HSubscript1:

mu

less than<

equals=

not equals

greater than>

greater than or equals

less than or equals

enter your response here

(Type integers or decimals.)