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

It is currently 01 Sep 2015, 08:27
GMAT Club Tests

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

The arithmetic mean and standard deviation of a certain

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 02 Oct 2007
Posts: 112
Followers: 1

Kudos [?]: 1 [0], given: 0

The arithmetic mean and standard deviation of a certain [#permalink] New post 28 Oct 2007, 10:45
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

The arithmetic mean and standard deviation of a certain normal distribution are 13.5 and 1.5 respectively. What value is exactly 2 standard deviations less than the mean.

A) 10.5
B) 11
C) 11.5
D) 12
E) 12.5
VP
VP
User avatar
Joined: 09 Jul 2007
Posts: 1105
Location: London
Followers: 6

Kudos [?]: 78 [0], given: 0

Re: PS [#permalink] New post 28 Oct 2007, 11:00
JDMBA wrote:
The arithmetic mean and standard deviation of a certain normal distribution are 13.5 and 1.5 respectively. What value is exactly 2 standard deviations less than the mean.

A) 10.5
B) 11
C) 11.5
D) 12
E) 12.5


13.5
std=1.5

2 standard deviations = 1.5*2=3

2 std less than the mean 13.5-3=10.5
A
Re: PS   [#permalink] 28 Oct 2007, 11:00
Display posts from previous: Sort by

The arithmetic mean and standard deviation of a certain

  Question banks Downloads My Bookmarks Reviews Important topics  


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®.