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catchmeifyoucan · 2008 October 4th, 07:53 PM

500 recoreds have the distribution that is symmetric about the mean 10.If 68% of distribution lies within one standard devition of the mean and the deviation is 2, then atleast how many records are less than 12?

160
320
340
420
460

SPOILER: D

2008 October 4th, 07:53 PM	#1 (permalink)
catchmeifyoucan Eager! Join Date: Sep 2008 Posts: 47	Standard Deviation 500 recoreds have the distribution that is symmetric about the mean 10.If 68% of distribution lies within one standard devition of the mean and the deviation is 2, then atleast how many records are less than 12? 160 320 340 420 460 SPOILER: D