Both the ranges of 2 lists are from 1 to 100, whose : DS Archive
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# Both the ranges of 2 lists are from 1 to 100, whose

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Both the ranges of 2 lists are from 1 to 100, whose [#permalink]

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18 Aug 2006, 02:06
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Both the ranges of 2 lists are from 1 to 100, whose deviation is greater?
1) List 1 has three 100 and two 50; List 2 has two 100 and three 50.
2) The averages are the same.

Really having a tough time with SD problems. Pls help The official answer is C. I don't know if the question is properly stated. Got this one from the question bank. What if inspite of the fact that their averages and ranges are the same, one set has a lot more elements than the other one that is further from the mean shouldnt this impact the Sd?
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18 Aug 2006, 02:16
What a poorly worded question! I agree that the answer should be E
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18 Aug 2006, 02:23
Hi kevin,

Can you just give me some tips on how to handle SD type questions?

I've noticed that the question will often state that they have the same range and same average. I even encountered one wherein the average of one set was said to be higher than the other, but the two sets have the same range. Is it safe to assume that range and average have no bearing with regards to whether the SD of one set is higher than the other?
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18 Aug 2006, 02:32
apollo168 wrote:
Hi kevin,

Can you just give me some tips on how to handle SD type questions?

I've noticed that the question will often state that they have the same range and same average. I even encountered one wherein the average of one set was said to be higher than the other, but the two sets have the same range. Is it safe to assume that range and average have no bearing with regards to whether the SD of one set is higher than the other?

I am loath to say "no bearing", but for large sets, this is quite true. I'll write some example questions over the next few days
18 Aug 2006, 02:32
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