Skewness
A
measure of the symmetry of a distribution around its mean. Positive values
indicate a shift or tail to the right; negative values indicate a shift
or tail to the left. Skewness is 0 for 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