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# Normal dist: Empirical rule &Circle graph & Measurement scale

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1) Using the empirical rule, determine the approximate percentage of a normal distribution that is expected to fall within 1 standard deviation of 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

https://brainmass.com/statistics/normal-distribution/normal-dist-empirical-rule-circle-graph-measurement-scale-399022

#### Solution Preview

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

#### Solution Summary

The solution contains explanations with the correct answers.

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