08-22-2016 06:25 PM
Define outlier. There is no actual standard definition, so you'll have to have some rule for that.
proc univariate may get you started with some ideas.
And what do you mean by "treat" the outliers? There are many approaches some can be pretty complex, others are as simple as set the value to missing or remove the observation from the dataset.
08-22-2016 10:52 PM
Yeah.There are many way you can define outliers: 1) [mean-2*std , mean+2*std] out of this range is outliers. 2) [Q1- 1.5*(Q3-Q1) , Q3 + 1.5*(Q3-Q1)] out of this range is outliers. 3) Check proc robustreg
08-23-2016 09:43 PM