IJSRP, Volume 2, Issue 12, December 2012 Edition [ISSN 2250-3153]
Singh D.P ., Singh J.R.
In this paper we investigate the effect of auto-correlation on the power function of mean chart with known coefficient of variation. We synthesize the second order auto-correlation process by its three different roots. In particular, the shift in the auto-correlation structure from independent data to a random walk, this is a special case of the structural shift occurring in the process. For various values of roots the values of power functions are tabulated with known coefficient of variation.