You Have Lived in Columbus for More Than 20 Years

question 49

Multiple Choice

You have lived in Columbus for more than 20 years and know that there is at least a 75% chance of a high temperature above freezing on a particular January day. This is an example of:

• A)the addition rule for disjoint events.
• B)a sample space.
• C)a personal probability.
• D)a random variable.

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Definitions:

Mean

A statistic that represents the average value in a set of numbers, calculated by adding all values and dividing by the number of values.

Placebo

A substance with no therapeutic effect, used as a control in testing new drugs, or used to stimulate a patient's psychological healing process.

StdDev

Standard Deviation, a measure of the amount of variation or dispersion in a set of values.

Median

The central number in a series that divides the upper half from the bottom half.