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#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.  # The list l consists of four integers w^2, x^2, y^2, z^2 in increasing

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Manager  P
Joined: 29 Oct 2019
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The list l consists of four integers w^2, x^2, y^2, z^2 in increasing  [#permalink]

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Difficulty:   15% (low)

Question Stats: 85% (00:52) correct 15% (01:23) wrong based on 27 sessions

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The list l consists of four integers w^2, x^2, y^2, z^2 in increasing order. Which of the following list of integers must have the same standard deviation as list L?

(A) w, x, y, z

(B) w^2 - 4, x^2 - 4, y^2 - 4, z^2 ¬- 4

(C) w^4, x^4, y^4, z^4

(D) w^2/ 2, x^2/ 2, y^2/ 2, z^2/ 2

(E) 4w^2, 4x^2, 4y^2, 4z^2

Source: GMAT Quantum Math Course
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Joined: 30 Jan 2020
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Re: The list l consists of four integers w^2, x^2, y^2, z^2 in increasing  [#permalink]

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Target Test Prep Representative V
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Re: The list l consists of four integers w^2, x^2, y^2, z^2 in increasing  [#permalink]

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sjuniv32 wrote:
The list l consists of four integers w^2, x^2, y^2, z^2 in increasing order. Which of the following list of integers must have the same standard deviation as list L?

(A) w, x, y, z

(B) w^2 - 4, x^2 - 4, y^2 - 4, z^2 ¬- 4

(C) w^4, x^4, y^4, z^4

(D) w^2/ 2, x^2/ 2, y^2/ 2, z^2/ 2

(E) 4w^2, 4x^2, 4y^2, 4z^2

Source: GMAT Quantum Math Course

Since the standard deviation of a set does not change when we subtract a constant from each term in a set, w^2, x^2, y^2, z^2 has the same standard deviation as w^2 - 4, x^2 - 4, y^2 - 4, z^2 - 4.

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If you find one of my posts helpful, please take a moment to click on the "Kudos" button. Re: The list l consists of four integers w^2, x^2, y^2, z^2 in increasing   [#permalink] 09 Feb 2020, 05:19
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# The list l consists of four integers w^2, x^2, y^2, z^2 in increasing  