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:

