The Standard Deviation of a Discrete Random Variable σ Is

question 166

Multiple Choice

The standard deviation of a discrete random variable σ is the positive square root of its:

• A)variance.
• B)mean.
• C)median.
• D)mode.

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Definitions:

Correlation Coefficient

The correlation coefficient is a statistical measure that calculates the strength and direction of the relationship between two variables, ranging from -1 to 1.

Variance Inflation Factor

A measure of how much the variance of an estimated regression coefficient increases if your predictors are correlated.

Independent Variables

Factors within an experiment or model that are intentionally altered to study their impact on outcome variables.

Residuals

The differences between observed values and the values predicted by a regression or other statistical model.