Q1:

What is the shape of the graph of a normal distribution?

A. rectangular B. triangular C. bellshaped D. bimodal 
Answer 1:


Q2:

Approximately what percentage of values lie within two standard deviations of the mean of a normal distribution? 
A. 34% B. 68% C. 95% D. 99% 
Answer 2:


Q3:

A normal distribution has a mean of 10 and a standard deviation of 2. What is the probability that a value chosen at random is more than 10? 
A. 0.34 B. 0.475 C. 0.495 D. 0.5 
Answer 3:


Q4:

For the distribution in question 3, what is the probability that a value chosen at random is less than 12? 
A. 0.34 B. 0.5 C. 0.84 D. 0.95 
Answer 4:


Q5:

For the distribution in question 3, what is the probability that a value chosen at random is between 10 and 13?

A. 0.5 B. 0.4332 C. 0.4987 D. 0.9332

Answer 5:


Q6:

A distribution with the same mean, median and mode is always called a normaldistribution. 
A. True B. False 
Answer 6:


Q7:

What is the mean of the standard normal distribution? 
A. 0 B. 0.5 C. 1 D. 50 
Answer 7:


Q8:

Peoples' weights are normally distributed with a mean of 70 kg and a standard deviation of 10 kg.
What percentage of people would have a weight between 60 kg and 80 kg?

A. 34% B. 68% C. 95% D. 99% 
Answer 8:


Q9:

For the people in question 8, what percentage of people would have a weight greater than 45 kg 
A. 49.38 B. 99.38 C. 49.50 D. 99.50

Answer 9:


Q10:

What is the standard deviation of the standard normal distribution? 
A. 0 B. 0.5 C. 1 D. 50 
Answer 10:

