Question 1178602
point estimate is 9%
Ho: p=0.12
Ha: p NE 0.12
alpha = 0.05 p{reject Ho|Ho true}
test stat is a z=(p hat-p)/sqrt(p(1-p)/n)
two way test, reject z if |z|>1.96
z=-0.03/sqrt(.12*.88/300)
=-0.03/0.0188
=-1.60
fail to reject Ho, insufficient evidence to refute educator's claim.
p-value is 0.11