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Portable Network Graphic  |  1994-04-29  |  75KB  |  816x1056  |  8-bit (256 colors)
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OCR: Plot of Paired t-test The Paired t-Test adds the following set of lines to the scatterplot in Fit Y by x .The gray line reference that shows where the two variables are equal. If the vertical and horizontal scales are set the same the gray line 15 degree line through the origin. If the true difference in means zero you should see the points fairly balanced on both sides of the gray line .The points above the gray line are those where the variable greater than the variable; below the line Y is less than At a quick look, you see how many values are on 10 each side and if there is a pattern. .The solid line has the same slope as the gray line but is 7 5 displaced by the difference n the means (in the direction or equivalently, ir the direction) The solid line balances the points on either sid ...