Ha should be p>0.7. Re-do the problem below and explain step by step.

H_o: p = 0.70

H_a: p 0.70

C = 095 a = 1 - C = 0.05

95% the level of confidence

0.975 from the z square table = 1.96 critical value

n = 250

P = x = 195/250 = .78 from the random sampling

P_{0 =}0.70