Kurtosis is a statistical concept. The value indicates whether a distribution is similar to the normal curve or different from the normal curve. Compared to the normal curve, kurtotic distributions of data appear either peaked in the middle or flat. In a normal distribution, the value of kurtosis = 0.
The peaked distribution has a positive value. It's called leptokurtic (think leap).
The flatter distribution has a negative value. It's called platykurtic (think of the animal, Platypus).
There are different formulas for calculating kurtosis.
In Excel, the function for kurtosis can be found under Formulas, More Functions. In the drop down list, choose KURT.
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