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

 It is currently 05 Jul 2015, 23:46

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# A car testing company tests its cars for the durability of

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Director
Joined: 17 Oct 2005
Posts: 938
Followers: 1

Kudos [?]: 69 [0], given: 0

A car testing company tests its cars for the durability of [#permalink]  18 Feb 2006, 15:14
A car testing company tests its cars for the durability of its tires. The company tested a certain number of tires for the length of their durability. Is the median time greater than the mean time?

I. More than 25% of the tires lasted longer than 4000 hours

II. Less than 50% of the tires lasted longer than 1000 hours
Intern
Joined: 16 Aug 2005
Posts: 37
Followers: 0

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

[#permalink]  20 Feb 2006, 00:29
I would say E.

Let's assume that the company tested 3 tires.
If we have 2 tires that lasted 5000 hours et 1 that lasted 4000 hours. Median is 5000 and mean is 4666 hours.
If we have 1 tire that lasted 5000 hours et 2 that lasted 4000 hours. Median is 4000 and mean 4333 hours.

Am I missing something here ?
Director
Joined: 05 Feb 2006
Posts: 899
Followers: 1

Kudos [?]: 54 [0], given: 0

[#permalink]  20 Feb 2006, 00:53
I would also say E just because the statements say more than that or less than that, so no exact value could be determined....
Intern
Joined: 10 Jan 2006
Posts: 7
Followers: 0

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

[#permalink]  20 Feb 2006, 06:12
Hi,

Is the answer C? Answer Choice C applies for all n > 2.
For n <= 2, the question stem does not make sense because 50% of 2 is 1 and less than 50% of the tires (here 2) last more than 1000 hours.

So, I think the answer should be C.
Can you please give the OA?

THanks.
Intern
Joined: 16 Aug 2005
Posts: 37
Followers: 0

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

[#permalink]  20 Feb 2006, 06:25
I would say C if the 2 hypothesis were:
I. More than 25% of the tires lasted longer than 4000 hours
II. More than 50% of the tires lasted longer than 1000 hours

In this case for 1+2) we would have:
Median < 1000 since at least 50% of tires < 1000
and Mean > 1000 since at least 25% of tires >4000

so Median < Mean
Intern
Joined: 10 Jan 2006
Posts: 7
Followers: 0

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

[#permalink]  20 Feb 2006, 06:37
petefromi,

if more than 50% of the tires lasted more than 1000 hours, median > 1000 and not < 1000.
Your explanation is fits exactly if the question is as it is.
Intern
Joined: 16 Aug 2005
Posts: 37
Followers: 0

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

[#permalink]  20 Feb 2006, 06:49
Sirisha: you're right I misread the question.

C it is.
Director
Joined: 17 Oct 2005
Posts: 938
Followers: 1

Kudos [?]: 69 [0], given: 0

[#permalink]  20 Feb 2006, 15:37
oa is E

I dont understand what you guys think is wrong with the question

Here is my reasoning

suppose there are 4 tires, a,b,c,d

1, b, 4001,4001

b can be anywhere from 1000 to 4000

here, the mean has to be more than 1000

the median has to be more than 1000

but there is no relation.
[#permalink] 20 Feb 2006, 15:37
Similar topics Replies Last post
Similar
Topics:
A certain company that sells only cars and trucks reported 1 06 Nov 2008, 09:54
Q34: A certain company that sells only cars and trucks 1 04 Oct 2008, 09:06
There are 5 cars in a car dealer and 5 keys. The sales 4 30 Jul 2008, 00:46
A certain company that sells only cars and trucks reported 2 03 Jun 2008, 20:09
A certain company that sells only cars and trucks reported 3 08 Feb 2008, 02:07
Display posts from previous: Sort by

# A car testing company tests its cars for the durability of

 Question banks Downloads My Bookmarks Reviews Important topics

 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®.