Question

1) state your hypotheses; 2) draw a graph showing the critical z-scores and the rejection region; 3) calculate z-obtained; 4) make a conclusion.

To reduce the paperwork and administrative cost, a company wants to know whether employees are satisfied with the new reimbursement policy for meals during business travel. In an annual survey last year, 65% of all employees reported that they were satisfied with the old policy. To evaluate the new policy, the company conducts a new survey of 254 employees and finds that 160 of them support it. Is the new policy even less popular than the old one? Use α = 0.05.

Answer 1