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| testdata | Medical data of 5735 patients. |
| zdifference | zdifference for dataset |
| zdifference_binary | z-difference for binary variables |
| zdifference_coefvar | z-difference for the coefficient of vartiation for normal distributed variables. |
| zdifference_continuous | z-difference for continuous variables. |
| zdifference_nominal | z-difference for nominal variables. |
| zdifference_ordinal | weighted z-difference for ordinal variables |
| zdifference_var | z-difference for variance of continuous variable |