Find all School-related info fast with the new School-Specific MBA Forum

It is currently 17 Apr 2014, 10:30

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

70 75 80 85 90 105 105 130 130 130 The list shown consist of

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
Status: Gonna rock this time!!!
Joined: 22 Jul 2012
Posts: 551
Location: India
GMAT 1: 640 Q43 V34
GMAT 2: 630 Q47 V29
WE: Information Technology (Computer Software)
Followers: 2

Kudos [?]: 22 [0], given: 561

GMAT Tests User
Re: standard deviation : DS [#permalink] New post 04 Jan 2013, 04:53
Bunuel wrote:
mainhoon wrote:
How many of the 10 running times are more than one SD below the mean.

So then 1SD below the mean is 77.6. It asks how many of the 10 running times are more than 77.6? I just replaced the one SD below the mean by the value. There are more than 2... What am I missing?


You have a problem with wording.

WRONG reading:
How many of the 10 running times are more than one SD below the mean. So more than Mean-SD.

CORRECT reading:
How many of the 10 running times are more than one SD below the mean. So less than Mean-SD.


I am still not getting this..
Why is it less and not more..
Please elaborate ..
_________________

hope is a good thing, maybe the best of things. And no good thing ever dies.

Who says you need a 700 ?Check this out : http://gmatclub.com/forum/who-says-you-need-a-149706.html#p1201595

My GMAT Journey : end-of-my-gmat-journey-149328.html#p1197992

Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 17300
Followers: 2871

Kudos [?]: 18362 [0], given: 2347

GMAT Tests User CAT Tests
Re: standard deviation : DS [#permalink] New post 04 Jan 2013, 04:59
Expert's post
Sachin9 wrote:
Bunuel wrote:
mainhoon wrote:
How many of the 10 running times are more than one SD below the mean.

So then 1SD below the mean is 77.6. It asks how many of the 10 running times are more than 77.6? I just replaced the one SD below the mean by the value. There are more than 2... What am I missing?


You have a problem with wording.

WRONG reading:
How many of the 10 running times are more than one SD below the mean. So more than Mean-SD.

CORRECT reading:
How many of the 10 running times are more than one SD below the mean. So less than Mean-SD.


I am still not getting this..
Why is it less and not more..
Please elaborate ..


This is more verbal issue than math. In English the first reading is not correct while the second one is.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Director
Director
Status: Gonna rock this time!!!
Joined: 22 Jul 2012
Posts: 551
Location: India
GMAT 1: 640 Q43 V34
GMAT 2: 630 Q47 V29
WE: Information Technology (Computer Software)
Followers: 2

Kudos [?]: 22 [0], given: 561

GMAT Tests User
Re: 70 75 80 85 90 105 105 130 130 130 The list shown consist of [#permalink] New post 04 Jan 2013, 08:13
Got it finally..
here: http://www.beatthegmat.com/beat-the-sta ... tml#548282
_________________

hope is a good thing, maybe the best of things. And no good thing ever dies.

Who says you need a 700 ?Check this out : http://gmatclub.com/forum/who-says-you-need-a-149706.html#p1201595

My GMAT Journey : end-of-my-gmat-journey-149328.html#p1197992

Re: 70 75 80 85 90 105 105 130 130 130 The list shown consist of   [#permalink] 04 Jan 2013, 08:13
    Similar topics Author Replies Last post
Similar
Topics:
New posts 70, 75, 80, 85, 90, 105, 105, 130, 130, 130 The list joemama142000 4 18 Dec 2005, 12:24
New posts 70, 75, 80, 85, 90, 105, 105, 130, 130, 130 The list sheetal 5 18 Apr 2006, 01:33
New posts 70,75,80,85,90,105,105,130,130,130 n=10 mean =100 std = 22.4 gmat_march 3 09 Aug 2007, 12:51
New posts 1 70,75,80,85,90,105,105,130,130,130 The above list consists patrannn 6 21 Apr 2008, 02:40
New posts Verbal 130 yialanliu 1 17 Mar 2013, 18:19
Display posts from previous: Sort by

70 75 80 85 90 105 105 130 130 130 The list shown consist of

  Question banks Downloads My Bookmarks Reviews Important topics  

Go to page   Previous    1   2   [ 23 posts ] 



GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.