1) Using the empirical rule, determine the approximate percentage of a normal distributionthat is expected to fall within 1 standard deviationof the mean.

A. 34%

B. 50%

C. 47.5 %

D. 68%

2) A department of mathematical sciences has majors in four areas

Major Number of Majors

Mathematics 0

Computer Science 22

Actuarial Science 15

Statistics 10

If a circle graph is constructed for these data, what would be the percentage (to the nearest tenth of a percent) of the graph for each major?

3) Identify the statement “the number of telephone calls arriving at a switchboard per ten minute period” as an example of:

a. Nominal

b. Ordinal

c. Discrete

d. Continuous

1. Answer: D. 68%

Based on the empirical rule, in a normal distribution 68% of the data will fall within 1 standard deviation of the mean.

2. Please …

The solution contains explanations with the correct answers.