Suppose that the mean time for a certain car to go from 0 to

Suppose that the mean time for a certain car to go from 0 to 60 miles per hour was 8.1 seconds. Suppose that you want to test the claim that the average time to accelerate from 0 to 60 miles per hour is less than 8.1 seconds. What would you use for the alternative hypothesis?

Select one:

a. H₁ : m = 8.1 seconds

b. H₁ : m ? 8.1 seconds

c. H₁ : m > 8.1 seconds

d. H₁ : m ? 8.1 seconds

e. H₁ : m < 8.1 seconds

Solution

Since we need to test if the average is less than 8.1 seconds, we use

H1: m<8.1 seconds.