First identify the following
Population mean: 22%
Sample size = 139
Sample mean: 26%
Z = (sample mean - population mean)/sqrt((pop mean*(1-pop mean))/sample size
Z = 0.04/sqrt((0.22)(0.78))/139
Z= 1.1384
P value using z score table is 0.8729
But that is for values within that range we want values greater than 22%. So it would be 1-0.8729 = 0.1271 or A
