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.

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:

Re: 70 75 80 85 90 105 105 130 130 130 The list shown consist of [#permalink]
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 SDbelow 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.

Re: 70 75 80 85 90 105 105 130 130 130 The list shown consist of [#permalink]
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 SDbelow 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. _________________

Re: 70 75 80 85 90 105 105 130 130 130 The list shown consist of [#permalink]
19 Jun 2014, 03:49

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________