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It is important to remember that there is no formal definition of an outlier. An outlier is an observation (or a small number of observations) which is (area) out of line with the rest of the observations.

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Q: How can you tell whether a data set has an outlier explain?
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What is the outlier of this data 615182021222425282930?

i can not tell you need to space it out and to find outlier try using a box and whisker plot. and if it is just one number there is no outlier


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