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Re: std deviation [#permalink]
it is D. See Bunuel's explaination.
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Re: std deviation [#permalink]
Answer is D - Y,X,Z

For X - SD remains unchanged

For Y - SD is multiplied by 1.5

For Z - SD is divided by -4

OA given is wrong.
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Re: Set A consists of all even integers between 2 and 100 [#permalink]
Hi Bunnel,

Here in the question the arrangement asked is in descending order then why answer is D.

D option's arrangement is in ascending order isn't it.
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Re: Set A consists of all even integers between 2 and 100 [#permalink]
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taleesh wrote:
Hi Bunnel,

Here in the question the arrangement asked is in descending order then why answer is D.

D option's arrangement is in ascending order isn't it.


Y has the greatest SD, then comes X followed by Z, which has the least SD. So, Y, X, Z is in descending order.
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Re: Set A consists of all even integers between 2 and 100 [#permalink]
Hi Bunnel,

Thanks for the reply, i realized now it should be greater to smaller. Got confused, now it is clear.
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Re: Set A consists of all even integers between 2 and 100 [#permalink]
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So division (as in dividing every term in the set by the same number) makes the SD smaller, correct?

I understand the problem and what concepts apply but was lost when it came to division and SD.
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Set A consists of all even integers between 2 and 100 [#permalink]
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gracie90 wrote:
So division (as in dividing every term in the set by the same number) makes the SD smaller, correct?

I understand the problem and what concepts apply but was lost when it came to division and SD.



Check out this video on SD here: https://youtu.be/0E6FQMzQVj0
and this post: https://anaprep.com/sets-statistics-sta ... formation/

Originally posted by KarishmaB on 14 Feb 2019, 21:05.
Last edited by KarishmaB on 30 Nov 2023, 09:16, edited 1 time in total.
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Re: Set A consists of all even integers between 2 and 100 [#permalink]
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Re: Set A consists of all even integers between 2 and 100 [#permalink]
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