Page 183 - Probability Demystified

172 CHAPTER 9 The Normal Distribution

CHAPTER QUIZ

1. What is the mean of 18, 24, 6, 12, 15, and 12?

a. 12
b. 14.5
c. 87
d. 10.6
2. What is the median of 25, 15, 32, 43, 15, and 6?
a. 20
b. 15
c. 22.8
d. 23.5

3. What is the mode of 17, 19, 26, 43, 26, 15, and 14?
a. 22.9
b. 26
c. 17
d. None
4. What is the range of 32, 50, 14, 26, 18 and 25?

a. 36
b. 25
c. 18
d. 43

5. What is the standard deviation of 12, 18, 14, 22, and 21?
a. 3.9
b. 18.8
c. 4.3
d. 17.4
6. Which is not a property of the normal distribution?

a. It is bell-shaped.
b. It is continuous.
c. The mean is at the center.
d. It is not symmetrical about the mean.