GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

It is currently 04 Apr 2020, 17:34

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Which of the following values of n when added to the list of numbers:

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Manager
Manager
avatar
P
Joined: 29 Oct 2019
Posts: 226
Which of the following values of n when added to the list of numbers:  [#permalink]

Show Tags

New post 05 Feb 2020, 03:25
1
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

58% (01:16) correct 42% (01:24) wrong based on 31 sessions

HideShow timer Statistics

Which of the following values of n when added to the list of numbers: 8, 16, 18 and 22, would result in a new set of five numbers that would have the least possible of standard deviation?

(A) -16

(B) 0

(C) 16

(D) 17

(E) 18

Source: GMAT Quantum Math Course
Manager
Manager
avatar
B
Joined: 27 Jun 2015
Posts: 70
GRE 1: Q158 V143
CAT Tests
Re: Which of the following values of n when added to the list of numbers:  [#permalink]

Show Tags

New post 05 Feb 2020, 10:18
When a number Equal to mean is added to a list of number then it causes no change in standard deviation
Intern
Intern
avatar
B
Joined: 08 Jan 2020
Posts: 6
Which of the following values of n when added to the list of numbers:  [#permalink]

Show Tags

New post 05 Feb 2020, 12:21
Which of the following values of n when added to the list of numbers: 8, 16, 18 and 22, would result in a new set of five numbers that would have the least possible of standard deviation?

For this question, we are looking for the value of n that gives the least possible standard deviation. This means that we are looking for a value for n that deviates the least from the mean. In this case, the mean of the set of 8,16,18 and 22 is (8+16+18+22)/4 = 16. So, the number that would cause the least possible standard deviation would be a number closest to the mean (a number that is the same is the mean would cause no change in standard deviation at all). In this case, the answer must be 16.

Answer is C


(A) -16

(B) 0

(C) 16

(D) 17

(E) 18
Target Test Prep Representative
User avatar
V
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 9960
Location: United States (CA)
Re: Which of the following values of n when added to the list of numbers:  [#permalink]

Show Tags

New post 09 Feb 2020, 05:16
sjuniv32 wrote:
Which of the following values of n when added to the list of numbers: 8, 16, 18 and 22, would result in a new set of five numbers that would have the least possible of standard deviation?

(A) -16

(B) 0

(C) 16

(D) 17

(E) 18

Source: GMAT Quantum Math Course


The mean of the given list is 64/4 = 16.

Thus, when 16 is added to the list, the standard deviation will decrease.

Answer: C
_________________

Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
TTP - Target Test Prep Logo
197 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

GMAT Club Bot
Re: Which of the following values of n when added to the list of numbers:   [#permalink] 09 Feb 2020, 05:16
Display posts from previous: Sort by

Which of the following values of n when added to the list of numbers:

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne