Non-examples of quartiles include values that do not divide a dataset into four equal parts, such as the mean or median, which represent central tendencies rather than specific data divisions. Additionally, any arbitrary number that does not correspond to the 25th, 50th, or 75th percentiles of a dataset is also a non-example. For instance, using the maximum or minimum values of a dataset would not be considered quartiles.
If the result is 1.5 x Inter Quartile Range (or more) above the Upper Quartile or 1.5 x Inter Quartile Range (or more) below the Lower Quartile.
you do work out the upper and lower quartile
values that divide a list of numbers into quaters is called a quartile.
It is the upper quartile minus the lower quartile.
The interquartile range :)