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An outlier can be very large or small. its usally 1.5 times the mean. they can be seen with a cat and whisker box

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The answer to the question is YES.

"Its usually 1.5 times the mean" is utter rubbish - apart from the typo. If a distribution had a mean of zero, such as the standard Normal distribution, then almost every observation would be greater than 1.5 times the mean = 0 and so almost every observation would be an outlier!

No.

There is no universally agreed definition for an outlier but one contender is values that are more than 1.5 times the interquartile range away from the median.

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Q: Outlier is unusually small or large data value?
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Related questions

What is the Outlier of data?

An outlier is a value that is way too small or way too large compared to other observations. There is no formal definition of what "way too" is.


An extreme value in a set is called what?

An outlier (mathematics/statistics), or radical value (sociology).


If an outlier is included with a sample of 50 values all of which are the same what is the effect of the outlier on the mean?

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.


How does an outlier effect the range?

An outlier will have a huge affect on the range as the range is the largest value minus the smallest value.


What is the effect of the a small outlier value Will it affect of a data set?

No. The data set will remain the data set: they are the observations that are recorded.


A value separated from the rest of the data?

outlier


Explain the difference between the range and the outlier?

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.


Is an outlier always min or max value?

Not necessarily.


What is an extreme value within a data set?

Outlier


If we are moving from a large value to a small value we move the decimal point to the?

If we are moving from a large value to a small value we move the decimal point to the left.


How does the outlier effect the mean median and mode in a set of data?

There would be a difference to the median. The old number wouldn't be the median but the mode wouldn't change. If the outlier is a high value, it will cause the mean value to shift to the higher side, while a low valued outlier will drop the mean value to a lower number.


What is the term for a value separated from the rest of the data?

A value separated from the rest of the data is called an outlier