According to a college survey, 22% of all students work full time. Find the mean for the number of students who work full time in samples of size 16.
A) 3.5 students
B) 2.8 students
C) 4.0 students
D) 0.2 students

Question

Quizplus · Accepted Answer

The mean of a binomial distribution is given by $n \times p$, where $n$ is the sample size and $p$ is the probability of success. Here, $n = 16$ and $p = 0.22$, so the mean is $16 \times 0.22 = 3.52$, which rounds to 3.5 students.

According to a College Survey, 22% of All Students Work