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For the 500 measurements obtained in experiment X, the aver

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For the 500 measurements obtained in experiment X, the aver [#permalink] New post 07 Dec 2017, 03:03
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For the 500 measurements obtained in experiment X, the average (arithmetic mean) value is 280 and the value k is at the 75 th percentile. For the 500 measurements obtained in experiment Y, the average value is 280 and the value n is at the 75 th percentile.

Quantity A
Quantity B
k
n


A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal
D. The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

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Re: For the 500 measurements obtained in experiment X, the aver [#permalink] New post 08 Dec 2017, 00:04
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the answer is D?
please help! thanks
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Re: For the 500 measurements obtained in experiment X, the aver [#permalink] New post 08 Dec 2017, 03:51
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Yes the answer is D.

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Re: For the 500 measurements obtained in experiment X, the aver [#permalink] New post 22 Jan 2018, 23:44
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I initially chose A but afterwards I made a comparsion with Median (Q2)
75% is Q3 and as median is the middlemost value Q3 is the 3/4 th value
As it is not necessary for middlemost value in both the set of experiments to be equal similarly it is not
necessary for 3/4th value in both the experiments to be equal as well
(d)
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Re: For the 500 measurements obtained in experiment X, the aver [#permalink] New post 23 Jan 2018, 09:14
It will be D.
Eventhough it mentions the total number, average and 75%. But still. Average doesnt make you assure of the values to be same. As the value can be diffrent with average same.
Re: For the 500 measurements obtained in experiment X, the aver   [#permalink] 23 Jan 2018, 09:14
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