951 means that 95.1% of the variation in salt concentration can be explained by roadway area. Some statistics references recommend using the Adjusted R Square value. Evaluate the R Square value (0.951)Īnalysis: If R Square is greater than 0.80, as it is in this case, there is a good fit to the data. NOTE: If the first cell of your y values column is blank, that column of data will be omitted from your Regression output. QI Macros will automatically perform the regression analysis calculations for you:.
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