How do you identify outliers?

The simplest way to detect an outlier is by graphing the features or the data points. Visualization is one of the best and easiest ways to have an inference about the overall data and the outliers. Scatter plots and box plots are the most preferred visualization tools to detect outliers.

What is a outlier in a scatter plot?

An outlier is defined as a data point that emanates from a different model than do the rest of the data. … If the outlier is omitted from the fitting process, then the resulting fit will be excellent almost everywhere (for all points except the outlying point).

What is the easiest way to identify outliers?

The most effective way to find all of your outliers is by using the interquartile range (IQR). The IQR contains the middle bulk of your data, so outliers can be easily found once you know the IQR.