In Regression Analysis, the Coefficient of Determination $$R ^ { 2 }$$

question 159

Multiple Choice

In regression analysis, the coefficient of determination, $$R ^ { 2 }$$ , measures the amount of variation in y that is:

• A) caused by the variation in x.
• B) explained by the variation in x.
• C) unexplained by the variation in x.
• D) caused by the variation in x or explained by the variation in x.

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Definitions:

Questionnaire

A set of questions designed for gathering information from respondents for research purposes.

Z-score

A calculation that determines how a particular value's distance from the mean of a set of values is expressed in standard deviations.

Outlier

An observation in data that is significantly different from the majority of the data, potentially due to variability in the measurement or an experimental error.

Median

The middle value in a data set, when the values are arranged in ascending or descending order, or the average of the two middle numbers when the dataset has an even number of observations.