00290    a2200109   4500082001500000100002500015245005200040250000900092260003500101300001600136650002800152  a519.5bWIC  aWickramasinghe, E.S.  aStatistical techniques for managerial decisions  a1st.  aKurunegalabAsliyac1997g1997  a157p.c21cm  aSTATISTICAL MATHEMATICS