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By definition, an outlier will not have the same value as other data points in the dataset. So, the correct question is "What is the effect of an outlier on a dataset's mean." The answer is that the outlier moves the mean away from the value of the other 49 identical values. If the outlier is the "high tail" the mean is moved to a higher value. If the outlier is a "low tail" the mean is moved to a lower value.
Range is the largest minus the smallest value in the data set. An outlier is a value that is far away from the majority of the data.
An outlier
the data value that is much higher or lower than the other data given is called an outlier
It may be an outlier.