TY - JFULL AU - Suparat Niwitpong PY - 2012/10/ TI - Confidence Intervals for the Normal Mean with Known Coefficient of Variation T2 - International Journal of Mathematical and Computational Sciences SP - 1364 EP - 1368 VL - 6 SN - 1307-6892 UR - https://publications.waset.org/pdf/13610 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 69, 2012 N2 - In this paper we proposed two new confidence intervals for the normal population mean with known coefficient of variation. This situation occurs normally in environment and agriculture experiments where the scientist knows the coefficient of variation of their experiments. We propose two new confidence intervals for this problem based on the recent work of Searls [5] and the new method proposed in this paper for the first time. We derive analytic expressions for the coverage probability and the expected length of each confidence interval. Monte Carlo simulation will be used to assess the performance of these intervals based on their expected lengths. ER -