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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

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

Show Tags

18 Feb 2006, 15:14

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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

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.

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?

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