Difference between proc means, proc summary and proc correlation
| Steps | Proc Means | Proc Summary | Proc correlation |
| Brief statistics | Compute statistics | Compute statistics | Compute statistics using nocorr option to preventing the print of correlation |
| Correlation | No | No | Yes |
| List report | Default it will give output | Default output will not get so proc print is required for list report | Default it will give output for simple statistics and Pearson correlation |
| Variable restriction | Var statements are used | Var statements are used | Var statements are used |
| Required Variable | At least required one variable for analysis | At least required one variable for analysis | Two variables are required for proc correlation for finding the relation between them |
| Default statistics | N, Minimum,maximum, Standard deviation and mean | N, Minimum,maximum, Standard deviation and mean | N, Minimum, maximum Standard deviation ,sum and mean here additionally SUM will coming extra |
| By statement | Used for calculating subgroup statistics prior that u have to sort the data by using proc sort statement | Used for calculating subgroup statistics prior that u have to sort the data by using proc sort statement | No need |
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