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Frequency Distributions

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stingraybullray
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Frequency Distributions [#permalink] New post   07 Nov 2008, 09:55
Question is attached. Please explain your answer.
Attachment:
Frequency Distribution.doc




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Re: Frequency Distributions [#permalink] New post   07 Nov 2008, 10:31
i feel its X only..

if you take each block upwards for 1 point and each 10 point for 1 point..then basically add the sum up and divide by the total u get that only x's mean=median
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Re: Frequency Distributions [#permalink] New post   07 Nov 2008, 11:28
IMO E is the answer. (X and Z have the mean equal to the median)
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Re: Frequency Distributions [#permalink] New post   07 Nov 2008, 11:31
E.

The frequency distribution for X and Z is symmetrical. Moreover, you can calculate mean and median and find out that these are equal for X and Z.
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Re: Frequency Distributions [#permalink] New post   07 Nov 2008, 19:34
i did calculate the mean of Z and its not the same as the median..

say each of the blocks represents a weight of 1..

so for z you have 10(4)+20(3)+30(2)+40+50(2)+60(3)+70(4)=
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Re: Frequency Distributions [#permalink] New post   08 Nov 2008, 10:02
fresinha - you got it right.

As per you calculation it is 760/19 = 40 which is equal to the median.

OE is E.

Thanks everybody for your answers. I appreciate it.



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Re: Frequency Distributions [#permalink]
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