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. Find the mean and standard deviation for this binomial distribution.
A) Mean = 20, Standard Deviation $= 15$
B) Mean $= 80$, Standard Deviation $= 3.87$
C) Mean = 20, Standard Deviation $= 3.87$
D) Mean = 80, Standard Deviation $= 15$

Question

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. Find the mean and standard deviation for this binomial distribution. 
A) Mean = 20, Standard Deviation $= 15$
B) Mean $= 80$, Standard Deviation $= 3.87$
C) Mean = 20, Standard Deviation $= 3.87$
D) Mean = 80, Standard Deviation $= 15$

Quizplus · Accepted Answer

The Answer is C

A Study of College Students Stated That 25% of All =15= 15=15

A Study of College Students Stated That 25% of All $= 15$