Comments on: What proportion of these batteries can be expected to have lives of 322 hours or less? Assume a normal d?

Comments on: What proportion of these batteries can be expected to have lives of 322 hours or less? Assume a normal d? http://www.batterybackupguide.com/blog/what-proportion-of-these-batteries-can-be-expected-to-have-lives-of-322-hours-or-less-assume-a-normal-d/ Mon, 21 May 2012 21:28:59 +0000 http://wordpress.org/?v=2.7 hourly 1 By: M3 http://www.batterybackupguide.com/blog/what-proportion-of-these-batteries-can-be-expected-to-have-lives-of-322-hours-or-less-assume-a-normal-d/comment-page-1/#comment-2309 M3 Mon, 26 Oct 2009 21:00:13 +0000 http://www.batterybackupguide.com/blog/what-proportion-of-these-batteries-can-be-expected-to-have-lives-of-322-hours-or-less-assume-a-normal-d/#comment-2309 z-value = (322-300)/15 = +1.67 to 2 DP looking up the left tail for this z-value, proportion = 92.9%<a href="http://www.informationrestoration.com/file-recovery-software/file-recovery-software.htm"> M3</a> z-value = (322-300)/15 = +1.67 to 2 DP

looking up the left tail for this z-value,

proportion = 92.9% M3

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