In a statistical analysis of data, the outliers are the responses to the question that are the noticeable exceptions, the ones that do not fit with the majority of the answers you received in a survey. They are further away from the mean than might reasonably be expected (either way too high or way too low). If outliers are included in the final analysis of the data, they could easily skew the results.
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An outlier.
An outlier
No. The data set will remain the data set: they are the observations that are recorded.
There cannot be an outlier in a dataset that comprises only one number!
The mean is changed.