(I'm Overwhelmed) Data Analysis Progress Quiz #12 (Question 6 and 10)

GRE Quant Problem Solving
1

For first question, if the data is more spread out because SD is higher that means values are farther away from the mean right so % of values that falls within one SD is more for L2 than L1 with the same mean. So, why does the answer key shows “two quantities are equal as the correct answer” ?

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For this question, I want to ask why 28 is not correct because 0.16 is the m-2d value and 0.18 is m-d value and the area enclosed by them is 14% and 14% of 200 is 28. Could you explain where am I going wrong?

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2
  1. Consider each quantity independently. In Quantity A, you are taking one element from a certain list, and in Quantity B, you are taking another element from a different list.
  2. The answer is 28, not 56 - this will be fixed soon.
3

Ahh…makes sense. So, that means if we were taking numbers from the same list and if mean was unchanged but SD was changed then we won’t have the same % of values within one SD right?

4

If you’re taking numbers from the same list, the mean and standard deviation of that list must be the same.

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