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2010 Mar 08
2
variance of discrete uniform distribution
Hi all, I am REALLY confused with the variance right now. for a discrete uniform distribution on [1,12] the mean is (1+12)/2=6.5 which is ok. y=1:12 mean(y) then var(y) gives me 13 1- on http://en.wikipedia.org/wiki/Uniform_distribution_%28discrete%29 wiki the variance is (12^2-1)/12=143/12 2- http://www.solvemymath.com/online_math_calculator/statistics/continuous_distributions/uniform/param_uniform.php here which used (12-1)^2/12=121/12 all different 3 answers!!! All I am looking for is the variance of a random varia...