Unit Test #68

Select your answers to the following 5 questions from the pop-up menus in the right hand column. Clicking the "Begin Test Again" button will clear all the answers.

 

 

Q1:

 

X is a random variable with a binomial distribution.

If the parameters of X are n = 10 and π = 0.3

find P(X = 5)

A. 0.1029

B. 0.3087

C. 0.0282

D. 0.1681

Answer 1:

 

 

Q2:

 

For X in question 1, what is the expected value (mean) of the distribution?

A. 5

B. 4

C. 3

D. 2

Answer 2:

 

 

Q3:

 

For X in question 1, what is the standard deviation of X?

A. 3

B. 2.1

C. 7

D. 1.45

Answer 3:

 

 

Q4:

 

Y is a random variable with a binomial distribution.

If the parameters of Y are n = 8 and π = 0.8

find P(Y = 5)

A. 0.0092

B. 0.9908

C. 0.8532

D. 0.1468

Answer 4:

 

 

Q5:

 

.

For Y in question 4, what is the variance?

A. 1.28

B. 2.56

C. 1.13

D. 6.4

Answer 5: