What is outlier analysis and why is it important?
Outlier analysis is the process of identifying and examining data points that differ significantly from the rest of the dataset. It's important because outliers can skew results and lead to misleading conclusions.
How do you detect outliers in a dataset?
Common methods for detecting outliers include statistical tests like Z-scores, IQR (Interquartile Range), and visual methods like box plots.
Can you give an example of an outlier?
Sure! In a dataset of people's heights, if most people are between 5 and 6 feet tall, a height of 8 feet would be considered an outlier.
What should I do if I find outliers in my data?
You can either investigate the outliers to understand their cause, remove them if they're errors, or analyze them separately if they provide valuable insights.
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