%0 Journal Article
	%A Suparat Niwitpong and  Sa-aat Niwitpong
	%D 2013
	%J International Journal of Mathematical and Computational Sciences
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 81, 2013
	%T On Simple Confidence Intervals for the Normal Mean with Known Coefficient of Variation
	%U https://publications.waset.org/pdf/16732
	%V 81
	%X In this paper we proposed the new confidence interval for the normal population mean with known coefficient of variation. In practice, this situation occurs normally in environment and agriculture sciences where we know the standard deviation is proportional to the mean. As a result, the coefficient of variation of is known. We propose the new confidence interval based on the recent work of Khan [3] and this new confidence interval will compare with our previous work, see, e.g. Niwitpong [5]. We derive analytic expressions for the coverage probability and the expected length of each confidence interval. A numerical method will be used to assess the performance of these intervals based on their expected lengths.

	%P 1444 - 1447