No.
Outliers are part of the data and do not affect them.
They will, however, affect statistics based on the data and inferences based on the data.
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If the data numbers are all really close together than no. But if the data has numbers; for example: 12,43,45,51,57,62,90 (12 and 90 are the outliers) which are really far aprt, than yes.
They are called extreme values or outliers.
Outliers will make give the graph a long tail (or tails). Overall, the graph will be flatter and wider.
In statistics, outliers are values outside the norm relative to the rest of collected data. Many times they can skew the results and distort the interpretation of data. They may or may not indicate anything significant; they might just be an anomalous data point that is not significant. It is difficult to tell.
The range is very sensitive to outliers. Indeed if there are outliers then the range will be unrelated to any other elements of the sample.