Question 1162323
Ho: p is 0.70
Ha: p is NE 0.70
alpha=0.05, P{reject Ho|Ho true}
test statistic is a z
critical value is |z|>1.96



One sample proportion
test statistic is a z (p hat-0.70)/sqrt(p(1-p)/n1))
=-0.10/sqrt(.21/100))
=-2.18
reject Ho. There is a significant difference from 0.70
p value=0.029