In: Statistics and Probability
Suppose that at a large university 30% of students are involved in intramural sports. If we randomly select 12 students from this university, what is the probability that no more than 4 of these students are involved in intramural sports?
Solution:
p = 30% = 0.30
q = 1 - p = 0.70
n = 14
x: number of students nvolved in intramural sports
Using Binomial distribution
P ( no more than 4 students are involved in intramural sports) = p(X<=4)
= 0.5842 ( using binomial table )
P ( no more than 4 students are involved in intramural sports) = 0.5842
Binomial table for n = 14 and p = 0.30