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03 Feb 2011, 10:03
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How many integers lie between the mean and the Standard deviation?
Given 25,30,35,40,45.
Given 25,30,35,40,45.
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03 Feb 2011, 10:24
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How many integers lie between the mean and the Standard deviation?
Given 25,30,35,40,45.
Given 25,30,35,40,45.
This is not a GMAT type of question plus it has very poor and ambiguous wording.
If the question is: how many of the 5 listed data points are within 1 standard deviation of the mean then the answer will be 3: mean=35 and SD=~7, so there are 3 data points from mean-SD=35-7=28 to mean+SD=35+7=42, namely: 30, 35, and 40.
