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Skew:

-skew happens in the tail of a distribution
-when viewing a curve, this means skew occurs on the left or the right
-right skew occurs when a distribution has a right tail much larger than the left
Example of right skew:

-left skew occurs when a distribution has a left tail much larger than the right
Example of left skew

Peaks in data:

-distributions can have several peaks
-these peaks occur when growths of the curve are followed by recessions
-distributions that have a single peak are called unimodal
Example of unimodal distribution:


-distributions with two peaks are called bimodal
-distributions with more than two peaks can be referred to as polymodal or (numerical prefix)modal depending on the number of peaks

Example of bimodal distribution

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