Variance of Chebyshev polynomials
y=chebyshev_variance(n)
a 1-by-1 matrix of doubles, integer value, n>=0.
a matrix of doubles, the variance
Compute the variance
and
for n greater than 0, where X has the Chebyshev distribution.
chebyshev_variance(0) chebyshev_variance(1) chebyshev_variance(2)