A study of college students stated that 25% of all college students have at least one tattoo. In a random sample of 80 college students, let x be the number of the students that have at least one
Tattoo. Can the normal approximation be used to estimate the binomial distribution in this
Problem?
A)Yes
B)No

Question

Quizplus · Accepted Answer

The normal approximation to the binomial distribution can be used if both np and n(1-p) are greater than or equal to 5. Here, n = 80 and p = 0.25, so np = 80*0.25 = 20 and n(1-p) = 80*0.75 = 60, both of which are greater than 5.

A Study of College Students Stated That 25% of All