Problem 5 (15 Points) Use the binomial probability distribution to answer the fo
ID: 3052050 • Letter: P
Question
Problem 5 (15 Points) Use the binomial probability distribution to answer the following questions. Researchers conducted a study to determine whether there were significant differences in graduation rates between medical students admitted through special programs (such as affirmative action) and medical students admitted through the regular admissions criteria. It was found that the graduation rate was 64% for the medical students admitted through special programs (a) If 17 of the students from the special programs are randomly selected, find the probability that exactly 13 of them graduated. (b) If 17 of the students from the special programs are randomly selected, find the probability that fewer than 10 of them graduated.Explanation / Answer
Here p = 0.65
As per binomial distribution,
P(X=r) = nCr * p^r * (1-p)^(n-r)
a)
P(X = 13)
= 17C13 * 0.64^13 * 0.36^4 = 0.1208
b)
P(X < 10) = P(X <= 9) = 0.2395
This can be calculated using excel formula: =BINOM.DIST(9,17,0.64,TRUE)
c)
P(X > 9) = 1 - P(X <= 9)
P(X > 9) = 1 - 0.2395 = 0.7605