Question

we will track an SRS of 300 math students to see if they eventually take a higher level math course. Assume 15% of all students take a higher level course. the exact probability that p^(p-hat) will be less than 18% is between:

A) 91% and 91.5%
B) 93% and 93.5%
C) 6.5% and 7%
D) none of these

Answer 1

Mean = n*p = 300*0.15 = 45

Std = (n*p*q)^0.5 = (300*0.15*0.85)^0.5 = 6.1847

P(X<54)

D. None of these