Unit Test #73

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:

 

It is known that the number of accidents on a motorway occur at an average of 25 every year. X is a random variable for the number of accidents.

What type of probability distribution is X?

 

A. Binomial

B. Poisson

C. Normal

D. Rectangular

Answer 1:

 

 

Q2:

 

Could the normal distribution be used as a suitable approximation for X?

A. Yes

B. No

Answer 2:

 

 

Q3:

 

In question 1, if the normal approximation was used, what would be the mean of the normal approximation?

A. 5

B. 25

C. 625

D. 20

Answer 3:

 

 

Q4:

 

In question 1, if the normal distribution was used, what would be the standard deviation of the normal approximation?

A. 5

B. 25

C. 625

D. 20

Answer 4:

 

 

Q5:

 

In question 1, what is the probability that there will be more than 30 accidents?

A. 0.8333

B. 1.1

C. 0.3643

D. 0.1357

Answer 5: