The Random Variable X Represents the Number of Boys in a Family

question 17

Multiple Choice

The random variable x represents the number of boys in a family with three children. Assuming that births of boys and girls are equally likely, find the mean and standard deviation for the
Random variable x.

• A)mean: 1.50; standard deviation: .76
• B)mean: 2.25; standard deviation: .76
• C)mean: 2.25; standard deviation: .87
• D)mean: 1.50; standard deviation: .87

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Definitions:

Graph

A visual representation of data or mathematical functions, usually drawn on a coordinate plane, showing the relationship between two or more variables.

Equation

An equation is a mathematical statement that asserts the equality of two expressions, represented by the symbol "=".

Graph

A visual representation of data or a mathematical function using a coordinate system.

Center

The middle point of a shape or object, often an important concept in geometry and physics.