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can u pl post the full question? pl mention the source also.goelmohit2002 wrote:In which range does deviation of 11, 10, 10, 10, 12 and 12 lie.
[spoiler]OA = between 0 and 3. Can someone please tell why not between 0 and 1....if Standard deviation <= Range/2[/spoiler]
goelmohit2002 wrote:In which range does deviation of 11, 10, 10, 10, 12 and 12 lie.
[spoiler]OA = between 0 and 3. Can someone please tell why not between 0 and 1....if Standard deviation <= Range/2[/spoiler]
First of all, since this question does not have 5 answer choices, it's not a true GMAT question.In which range does deviation of 11, 10, 10, 10, 12 and 12 lie.
Brent@GMATPrepNow wrote:First of all, since this question does not have 5 answer choices, it's not a true GMAT question.In which range does deviation of 11, 10, 10, 10, 12 and 12 lie.
It may be possible that there's a rule that says: Standard Deviation < Range/2, I'm not sure.
However, we can be certain that Standard Deviation < Range, and that's all we need here.
Since the range = 2, we can be certain that the Standard Deviation < 2, so the standard deviation must lie between 0 and 3
Cheers,
Brent
This looks more like a GRE problem than a GMAT problem.goelmohit2002 wrote:In which range does deviation of 11, 10, 10, 10, 12 and 12 lie.
[spoiler]OA = between 0 and 3. Can someone please tell why not between 0 and 1....if Standard deviation <= Range/2[/spoiler]
