Question 1052857
The point estimate is 90/600=0.15
The standard error is sqrt(p*(1-p))/n)
sqrt(0.15*-0.85)/600
=sqrt(0.0002125)
=0.0146
95% CI is p hat +/- 1.96*SE
the interval is +/-0.0286
The 95%CI for the true proportion is (0.121,0.179)