Question: Question 8:

We ask if the attitudes toward fuel costs of 100 owners of hybrid electric cars (x? = 76) are different from those on a national survey of owners of non-hybrid cars (μ = 65, σ_{x =} 24). Higher scores indicate a more positive attitude.

(a) Is this a one- or two-tailed test?

(b) In words what is H₀ and H_a?

(c) Perform the z-test.

(d) What do you conclude about attitudes here?

(e) Report your results in the correct format.