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Outlier calculator

Outliers make statistical analyses difficult. This calculator performs Grubbs' test, also called the ESD method (extreme studentized deviate), to determine whether one of the values in the list you enter is a signficant outlier from the rest. Learn more about the principles of outlier detection and exactly how this test works.

1. Choose significance level

   Alpha = 0.05 (standard)
   Alpha = 0.01

2. Enter or paste your data

Enter one value per row, up to 2,000 rows.

3. View the results