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Compare standard deviation and residual analysis.

Describe when/how each are used.

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Step-by-step explanation:

The residual standard deviation is simply the standard deviation of the residual values, or the difference between a set of observed and predicted values. The standard deviation of the residuals calculates how much the data points spread around the regression line.

standard deviation is a quantity calculated to indicate the extent of deviation for a group as a whole.

Residual analysis is used to assess the appropriateness of a linear regression model by defining residuals and examining the residual plot graphs.

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