i want to simulate and compute the T- square multivariate control chart by using SAS/STAT
and i start write the code but i can't finish it
Tsquared is the squared Mahalanobis distance (with estimated covariance) between the observed mean and the null hypothesis mean. So use the following (untested):
S = cov(X); /* observed covariance */
xbar = mean(X); /* observed mean */
T2 = m*(xbar - mean)`*inv(S)*(xbar - mean);
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