Use the Addition Rule for Disjoint Events
-The Table Lists

question 188

Multiple Choice

Use the Addition Rule for Disjoint Events
-The table lists the drinking habits of a group of college students. If a student is chosen at random, find the probability of getting someone who is a non-drinker. Round your answer to three decimal places.
$\begin{array}{l|c|c|c|c}\text { Sex } & \text { Non-drinker } & \text { Regular Drinker } & \text { Heavy Drinker } & \text { Total } \\\hline \text { Man } & 135 & 43 & 5 & 183 \\\text { Woman } & 187 & 21 & 7 & 215 \\\text { Total } & 322 & 64 & 12 & 398\end{array}$

• A) \(0.809\)
• B) \(0.930\)
• C) 1
• D) \(0.191\)

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Definitions:

Operational Definition

A statement of the procedures (operations) used to define research variables. For example, human intelligence may be operationally defined as “what an intelligence test measures.”

Research Variable

An element or factor within a study that can be changed and manipulated, or measured and evaluated to determine its effects on the outcome of the study.

Case-Study Evidence

consists of detailed examinations of individuals or groups from a real-world context, often used in psychology and sociology to explore complex issues.

Operational Definitions

Specific explanations of abstract concepts or variables in terms of the procedures or operations by which they are measured or manipulated.