Question

8. Researchers tell you that, on average, people have 200 or fewer friends on Facebook. However, you believe that Facebook users, in fact, have more than 200 friends. You can set your hypotheses as: H0: Average number of friends ≤ 200 What will be the alternate hypothesis H1?

9. A statistics professor wants to know if her section’s grade average is different than that of other sections of the course. The average for all other sections is 75. To help the professor learn if her section’s grade average is different than that of other sections, set up the null hypotheses (H0) and alternate hypothesis (H1)

Answer 1

Solution :

8)

H0: Average number of friends ≤ 200

The alternate hypothesis H1 is :

H1 : > 200

9)

This is the two tailed test .

The null and alternative hypothesis is

H₀ : = 75

H₁ : 75