Suppose a group is interested in determining whether teenagers obtain their drivers licenses at approximately the same average age across the country. Suppose that the following data are randomly collected from five teenagers in each region of the country. The numbers represent the age at which teenagers obtained their drivers licenses. Use a level of significance of 0.10. Northeast South West Central
16.3 16.9 16.4 16.2
16.1 16.5 16.5 16.6
16.4 16.4 23.0 16.5
16.5 16.2 20.2 16.4
1. What test are you going to run?
a. One mean t-test
b. One mean z-test
c. Chi-Square Goodness of Fit
2. What is the null hypothesis?
a. The mean ages for teenagers obtaining their drivers licenses are approximately the same average age across the country.
b. At least one of the mean ages for teenagers obtaining their drivers licenses is different from the average age across the country.
3. What is the alternative hypothesis?
a. At least one of the mean ages for teenagers obtaining their drivers licenses is different from the average age across the country.
b. The mean ages for teenagers obtaining their drivers licenses are approximately the same average age across the country.