Linear Correlation and Regression
with Graph Optimized for Macintosh with Internet Explorer

• r = the Pearson product-moment correlation coefficient;
  
• r² = the coefficient of determination;
  
• the slope of the regression line;
  
• the Y intercept of the regression line;
  
• the standard error of estimate;
  
• the value of t associated with the calculated value of r; and
  
• the residual for each value of Y, calculated as
  residual = Y—(intercept+[slope(X)])

The logic and computational details of correlation and regression are described in Chapter 3 of Concepts and Applications.

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Procedure:
The procedures for data entry depend on which browser and browser version you are using. [The browser you are now using is Netscape 3.04 (Macintosh; I; PPC).]
Netscape Navigator 3.0 or later and Internet Explorer 3.0 or later:
   A. Direct Entry into Data Cells [describe]
Netscape Navigator 3.0 or later and Internet Explorer 4.5 or later:
   B. Import Data from a Spreadsheet [describe]
   C. Import Data from another VassarStats Page [describe]
   D. Export Data to a Spreadsheet
        or to another VassarStats Page [describe]

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If you are importing or exporting data, you might find it handy to use the Data Storage Window.

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If you wish to perform another analysis with a different set of data: click the "Reset" button if the value of n for the new set of data is or smaller; click the "Reload" button if the value of n is larger than .

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Data Entry:

	Data Cells			Import/Export Box
Pairs	X	Y	Residuals	Xa and Xb
				Clear this box	Import data to data cells Please read this message before importing data from a spreadsheet

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Values	X	Y	XY
n
sum
mean
sumsq
SS
variance			Variances and standard deviations are calculated with denominator=n-1.
standard deviation

r	r2	Slope	Y Intercept	Standard Error

t	df

P	one-tailed
	two-tailed

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Y					xxx
			X
Please be sure to clear the graph  before performing a new analysis.

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Printable Report—for Netscape Navigator 3.0 or later and Internet Explorer 4.5 or later. Do not click this button if you are using a version of Internet Explorer earlier than 4.5. [The browser you are now using is .]

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©Richard Lowry 1998-2001
All rights reserved.

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