Health Sciences 2801A/B Study Guide - Quiz Guide: Scatter Plot, Dependent And Independent Variables, Celsius
28 Nov 2016
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* a = m0 (the mean of the reference category or the group that gets. * b = m1 - m0 (b is equal to the difference between the means) * independent variable (x) can be continuous or categorical. The regression line should t the data reasonably well (therefore predicted scores should be fairly close to the actual observed scores) * if y" = y, the ss of the predicted scores = ss of the observed scores r - goodness of t ratio, ranges from 0 to 1 (1 is a perfect t) * mean of y always = mean of y". * ssy always = ssreg + ssres standardized slope - uses z-scores rather than units in which the variables were originally measured. The constant is always equal to 0 (therefore there is no constant) The standardized slope() is readily calculated from the un-standardized slope (b) using the formula: = b(sx / sy) un-standardized slope - general formula:
