Question 1198408
Ho: p = .15
Ha: p ≠ .15
two-tailed
Sample: n = 100, x̄ = .18, 
.01 significance level

z = {{{z =blue (.18 -.15)/sqrt(blue((.15)(.85)/100))}}} = -.84
p = .2
 .2 > .01, Fail to reject Ho. 
Evidence not sufficient to support p ≠ .15