72.(11)

A company claims that the mean monthly residential electricity consumption in a certain region is more than

890

kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of

62

residential customers has a mean monthly consumption of

910

kWh. Assume the population standard deviation is

126

kWh. At

=0.10,

can you support the claim? Complete parts (a) through (e).

Question content area bottom

Part 1

(a) Identify

H0

and

Ha.

Choose the correct answer below.

A.

H0:

890

Ha:

>890

(claim)

B.

H0:

=890

(claim)

Ha:

890

C.

H0:

910

Ha:

>910

(claim)

D.

H0:

=910

Ha:

910

(claim)

E.

H0:

>910

(claim)

Ha:

910

F.

H0:

>890

(claim)

Ha: