Kurtosis is a measure of the sharpness of the data peak. Traditionally the value of this coefficient is compared to a value of 0.0, which is the coefficient of kurtosis for a normal distribution (i.e. the bellshaped curve). A value greater than 0 indicates a peaked distribution and a value less than 0 indicates a flat distribution. Without a very large sample size, the use of this coefficient is of questionable value.
Population Kurtosis ()
Sample Kurtosis ()
(adapted from King and Julstrom, 1982)
where
S 

N 
= number of data values for a population 
n 
= number of data values for a sample 
xi 
= ith data value 
See Also
95% and 99% Confidence Interval for the Mean
Critical Value of KS Statistic at 90%, 95%, and 99% Significance Level
KolmogorovSmirnov Goodness of Fit Statistic for Normal Distribution