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You should remove outliers from your data when the value is completely impossible. Examples include a negative weight, or an age (of a person) that exceed 150 ...

https://www.graphpad.com/guides/prism/latest/statistics/

Statisticians have devised several methods for detecting outliers. All the methods first quantify how far the outlier is from the other values. This can be the ...

https://www.graphpad.com/guides/prism/latest/statistics/

Robust methods. Some statistical tests are designed so that the results are not altered much by the presence of one or a few outliers. Such tests are said to be ...

https://www.graphpad.com/guides/prism/latest/statistics/

Note that Prism does not remove the outlier from the regular data set. When you plot mean and error bar, the outlier is included in the calculation. When you ...

https://www.graphpad.com/guides/prism/latest/curve-fitting/

However, experimental mistakes can lead to erroneous values – outliers. Even a single outlier can dominate the sum-of-the-squares calculation, and lead to ...

https://www.graphpad.com/guides/prism/latest/curve-fitting/

In Prism's nonlinear regression, an outlier is a point that is far from the best-fit curve defined by robust regression.

https://www.graphpad.com/guides/prism/latest/curve-fitting/

No surprise there. But Grubbs' test doesn't find any outliers in the data set on the right. The presence of the second outlier prevents the outlier test from ...

GraphPad FAQs

Prism can identify outliers in each column using either the Grubbs' or ROUT method. Outlier detection can be a useful way to screen data for problems, ...

https://www.graphpad.com/guides/prism/latest/statistics/

... outlier(s), are sampled from a Gaussian distribution ... Three of those data sets seem to include an outlier, and indeed Grubbs' outlier test identified outliers ...

https://www.graphpad.com/guides/prism/latest/statistics/

Prism first identifies any outliers, and then reruns the fit with those outliers excluded. The main table of results includes the number of outliers excluded, ...

GraphPad FAQs