Question 1040401
1 sample proportion
p=15/80=0.1875
CI interval +/- is z(0.995) sqrt{p(1-p)/n}
2.576*sqrt{(0.1875)(0.8125)/80}; the second term is 0.0436
multiplied by 2.576 is 0.1124
CI is (0.0751,0.2999)
It is C.