A researcher wants to show that greater than 80 of the popul

A researcher wants to show that greater than 80% of the population has a cell phone. She samples 1000 individuals and 830 of them have a cell phone. What are the appropriate hypotheses?

            A.      

Null Hypothesis: p = .80 Alt. Hypothesis: p < .80

            B.      

Null Hypothesis: p = .80 Alt. Hypothesis: p > .80

            C.      

Null Hypothesis: p = .83 Alt. Hypothesis: p > .83

            D.      

Null Hypothesis: p < .80 Alt. Hypothesis: p = .80

Solution

Answer: B. Null Hypothesis: p = .80 Alt. Hypothesis: p > .80

because we want to test if greater than 80% of the population has a cell phone.