Mosaic plots graphically displaying data from 2 × 2 contingency tables

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Lesson #29 2  2 Contingency Tables. In general, contingency tables are used to present data that has been “cross-classified” by two categorical variables.

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Mosaic plots graphically displaying data from 2 × 2 contingency tables. Mosaic plots graphically displaying data from 2 × 2 contingency tables. A, Unblinding of the author is associated with a higher rate of manuscript acceptance. B, Unblinding of the institution is associated with a higher rate of manuscript acceptance. There are 4 cells, and the area of each cell represents the frequency of each of the 4 unique combinations of variable levels. The “standardized residual” is the residual divided by its SD. Therefore, the standardized residual rating represents the degree to which the 2 categorical variables are independent of each other, in units of SD. Colors represent the deviation in each cell from those expected from the null hypothesis that the 2 variables are not associated, with the color intensity indicating the degree of “surprise” associated with rejection of the null hypothesis (http://www.r-tutor.com/elementary-statistics/simple-linear-regression/standardized-residual). E.E. O'Connor et al. AJNR Am J Neuroradiol 2017;38:230-235 ©2017 by American Society of Neuroradiology