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Missing values
Duplicate rows
9. Introduction to outliers
Joining datasets


Perfect! The third frequent problem with datasets is that they contain outliers. Outliers are values that are distant from other values. In other words, they're found at the very extremes of the dataset, far from the center. Sounds vague? Let's look at an example.


Create a DataFrame named temperatures based on the temperatures.csv file. After that, show the contents of temperatures.

Note the temperature value for the year 2000 is very big as compared to the temperatures of other years.