Suppose that 50% of all college students smoke cigarettes. a sample of 14 is selected randomly. what is the probability that less than 13 students smoke?
Accepted Solution
A:
X~B(14, 0.5) n = 13
P(X < 13) = 14C13 x 0.5^13 x 0.5 = 0.00085 = 8.5 x 10^-4