The Number of Electrical Outages in a City Varies from Day

question 17

Multiple Choice

The number of electrical outages in a city varies from day to day. Assume that the number of electrical outages x) in the city has the following probability distribution. $\begin{array}{ll}x&fx) \\0 & 0.80 \\1 & 0.15 \\2 & 0.04 \\3 & 001\end{array}$ The mean and the standard deviation for the number of electrical outages respectively) are

• A) 2.6 and 5.77
• B) 0.26 and 0.577
• C) 3 and 0.01
• D) 0 and 0.8

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Definitions:

Independent Variable

A factor in a model or study that is deliberately altered to examine its impact on the variable that is being measured.

Coefficient Of Determination

A statistical measure that determines the proportion of variance in the dependent variable predictable from the independent variable(s).

Dependent Variable

The variable in an experiment that is expected to change or respond when manipulated by the independent variable.

Coefficient Of Determination

A measure, usually denoted as R^2, that indicates the proportion of the variance in the dependent variable predictable from the independent variable(s).