Kurtosis
A
measure of the flatness or peaked-ness of a distribution. Kurtosis is 0
for a normal distribution. Values greater than 0 mean the distribution has
more of a peak than a normal distribution. Values less than 0 mean the distribution
is flatter than a normal distribution.
where xj is the observation
j, N is the total number of observations, x-doublebar is the Average
, and x
is the Sample Sigma .
where xj is the observation
j, N is the total number of observations, x-doublebar is the 
x
is the