Last visit was: 26 Jun 2024, 07:15 It is currently 26 Jun 2024, 07:15
Decision Tracker
My Rewards
New comers' posts
New posts
Unanswered

Close

GRE Prep 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 GRE 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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel
PREVIOUS TOPIC
NEXT TOPIC

No of Trees with dia greater than 49.4cm from Mean,Avg & SD?

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

avatar
yasir9909
Manager
Manager
Joined: 13 Aug 2016
Posts: 77
Own Kudos [?]: 138 [0]
Given Kudos: 0
GRE 1: Q158 V154
Send PM
No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   Updated on: 24 Aug 2016, 19:34
1
00:00

Question Stats:

33% (02:28) correct 66% (00:29) wrong based on 3 sessions

Hide Show timer Statistics

Refer to the following data:

----------------------------------------------------------------------------------------------------------------------
    Tree | Number of Trees | Average (Arithmetic Mean) Diameter | Standard Deviation of Diameter |

----------------------------------------------------------------------------------------------------------------------
    Oak | 64 | 58 | 11.2 |

----------------------------------------------------------------------------------------------------------------------
    Maple | 50 | 42 | 7.4 |

----------------------------------------------------------------------------------------------------------------------
    Hickory | 12 | 17 | 9.6 |

----------------------------------------------------------------------------------------------------------------------
    Ash | 8 | 39 | 14.5 |

----------------------------------------------------------------------------------------------------------------------
    Birch | 7 | 25 | 12.0 |
----------------------------------------------------------------------------------------------------------------------

How many maple trees had a diameter greater than 49.4cm?

Show: ::
OA=8

_____________________________________________________________________________________________________________________________________________________


Source : 1007 GRE Practice Questions by Princeton Review

Originally posted by yasir9909 on 23 Aug 2016, 08:54.
Last edited by yasir9909 on 24 Aug 2016, 19:34, edited 3 times in total.
avatar
Sonalika42
Manager
Manager
Joined: 12 Jan 2016
Posts: 142
Own Kudos [?]: 171 [0]
Given Kudos: 0
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   24 Aug 2016, 01:08
42

QA plzz
avatar
Sonalika42
Manager
Manager
Joined: 12 Jan 2016
Posts: 142
Own Kudos [?]: 171 [0]
Given Kudos: 0
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   24 Aug 2016, 01:09
Sorry Sorry my mistake....is the answer 8 ?
QA plzz
avatar
yasir9909
Manager
Manager
Joined: 13 Aug 2016
Posts: 77
Own Kudos [?]: 138 [0]
Given Kudos: 0
GRE 1: Q158 V154
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   24 Aug 2016, 03:54
Sorry I forgot to share OA. Your answer is correct.Could you please also share the detailed step by step solution?How to add tags to a post?
Table looks OK in edit mode but gets distorted when posted
User avatar
sandy
Retired Moderator
Joined: 07 Jun 2014
Posts: 4810
Own Kudos [?]: 10707 [0]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   24 Aug 2016, 13:14
2
Expert Reply
yasir9909 wrote:
Sorry I forgot to share OA. Your answer is correct.Could you please also share the detailed step by step solution?How to add tags to a post?
Table looks OK in edit mode but gets distorted when posted


Image

You have to remember this curve.

Given that mean of Maple trees is 42 and standard deviation is 7.4.

Now we want tree larger than 49.4 is all trees greater than one standard deviation. From figure we see that it accounts for \(13.6%+2.1%+0.1%\).

So number of tree more than one standard deviation is = \((13.6%+2.1%+0.1%)*50\) trees = 7.9 or approx 8.


Image


Regards,

Show: :: Img
Attachment:
test.jpg
test.jpg [ 69.33 KiB | Viewed 5567 times ]

About tags:
avatar
yasir9909
Manager
Manager
Joined: 13 Aug 2016
Posts: 77
Own Kudos [?]: 138 [0]
Given Kudos: 0
GRE 1: Q158 V154
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   24 Aug 2016, 19:45
Great,so other info is given just to confuse.As far as tags are concerned Tag option does not appear in user interface of user,please have a look on these screenshots


Image
Image


I have many other questions to share that I am now feeling reluctant to share because of this TAG issue
avatar
yasir9909
Manager
Manager
Joined: 13 Aug 2016
Posts: 77
Own Kudos [?]: 138 [0]
Given Kudos: 0
GRE 1: Q158 V154
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   24 Aug 2016, 21:36
One more subtle point to discuss here is that there is no mention of Normal Distribution in this question statement.Though your answer is correct,but what makes you assumes that the question is based on Normal Distribution?
avatar
yasir9909
Manager
Manager
Joined: 13 Aug 2016
Posts: 77
Own Kudos [?]: 138 [0]
Given Kudos: 0
GRE 1: Q158 V154
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   25 Aug 2016, 05:45
Here is what appears on my user interface of the page that you have pointed to:

Image

No TAGS option even on this page in my user interface
User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 28987
Own Kudos [?]: 33820 [0]
Given Kudos: 25392
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   25 Aug 2016, 05:57
1
Expert Reply
In this post we are mixing apple with orange. A question about SD with the tags option.

What is happening to you Dear Yasir is really odd. A registered user has the tag option both under a new post and after when it is created.

I will see why. But there is nothing to be disappointed :)
avatar
MostofaWahid
Intern
Intern
Joined: 04 Sep 2019
Posts: 13
Own Kudos [?]: 9 [0]
Given Kudos: 0
Send PM
Re: No of Trees with dia greater than 49.4cm from Mean,Avg & SD? [#permalink] New post   29 Sep 2019, 12:57
Read The Question Attentively!! It Must Help. Question asks for Maple Tree only.
Prep Club for GRE Bot
gmatclubot
[#permalink]
Moderators:
adewale223
GRE Instructor
28 posts
BrushMyQuant
Moderator
1088 posts
VibhuAnurag
GRE Instructor
218 posts

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

Main navigation

Partners

GRE Resources

www.ets.org/gre | About | Terms and Conditions and Privacy Policy | Prep Club for GRE Rules | Contact