Correlation / regression

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About

For paired observations, determines whether one is proportional to the other and gives the equation for the best-fit straight line (least squares).

Requires

Y variables and X variables to be compared. Tests with matching Y and X variables are not allowed.

Feature

Where one value of any data pair is missing, both values are ignored.

Parameters

Correlation / regression dialog

Variables

Select one or more Y variables and one or more X variables (See Selecting variables for details). Output will be produced for each pair of Y and X variables, dependant on the block mode selected.

Block Mode

Defines how the Y variables and X variables are compared. (See Performing multiple analyses for details)

Options

Graph

Allows you to choose a graph to accompany your output. Available options are:

The default graph can be selected in Preferences

Subtitle

Allows you to specify an optional subtitle which will be included in the statistical output.

Filters

Correlation / regression dialog

Allows you to select rows for analysis based upon conditions in other variables (See Filtering datasets for details)

Buttons

?

Opens the help system for this dialog.

Dataset…

Sends the output from this analysis to a new OxonStat Dataset. See Dataset output for more details.

Print…

Sends the output from this analysis to a printer.

Cancel

Cancels the analysis and closes the dialog.

Screen…

Displays the output from this analysis in the Results window.

Sample output

OxonStat20:40, 12 Aug 2023

Correlate:Weight_1 with Age
Subtitle:<none>
Statistic:Correlation / Regression
Dataset:OxonStat Demo
Range:Row 1 [Green] to Row 38 [Hall]
Filter:<no filter>
Count:38 of 38 rows selected

Sum squaresVarianceMean
Weight_117050.4512460.823081.8842
Age2181.634058.963156.0447
Covariance-1953.3430-52.7931
Regression425.0420

rtdfp
-0.32032.028360.0500

ValueSE95% CI
Slope-0.89540.4414-1.7905 to -0.0002
Intercept132.064324.962881.4374 to 182.6912

Correlation plot 25 50 75 100 125 150 175 Weight_1 35 40 45 50 55 60 65 70 Age Data Best fit 95% CI SE