Question 1129604
Assuming random sample, etc., this is a one sample proportion test
Ho: 80% stop
Ha: some other number stop
test statistic is a z and critical value is |z|>2.576
z=(p hat-p)/sqrt((p*(1-p)/n)' sqrt term is sqrt(.8*.2/195)=0.0286
z=0.036/0.0286=1.26
Fail to reject Ho; insufficient evidence to reject Ho