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* Coffee vending machine

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sanjeethbm
 Post subject: * Coffee vending machine
 Post Posted: Tue Jun 14, 2011 12:07 am 
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Students


Posts: 12
7.51 8.22 7.86 8.36
8.09 7.83 8.30 8.01
7.73 8.25 7.96 8.53
A vending machine is designed to dispense 8 ounces of coffee into a cup. After a test that recorded the number of ounces of coffee in each of 1000 cups dispensed by the vending machine, the 12 listed amounts, in ounces, were selected from the data. If the 1000 recorded amounts have a mean score of 8.1 ounces and a standard deviation of 0.3 ounce, how many of the 12 listed amounts are within 1.5 standard deviations of the mean.

Four Six Nine Ten Eleven

How do I approach this problem?

- Sanjeeth
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RonPurewal
 Post subject: Re: Coffee vending machine
 Post Posted: Tue Jun 14, 2011 7:50 am 
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ManhattanGMAT Staff


Posts: 7146
sanjeethbm wrote:
7.51 8.22 7.86 8.36
8.09 7.83 8.30 8.01
7.73 8.25 7.96 8.53
A vending machine is designed to dispense 8 ounces of coffee into a cup. After a test that recorded the number of ounces of coffee in each of 1000 cups dispensed by the vending machine, the 12 listed amounts, in ounces, were selected from the data. If the 1000 recorded amounts have a mean score of 8.1 ounces and a standard deviation of 0.3 ounce, how many of the 12 listed amounts are within 1.5 standard deviations of the mean.

Four Six Nine Ten Eleven

How do I approach this problem?

- Sanjeeth


please read the forum rules: read-before-you-post-general-verbal-folder-guidelines-t2718.html

you can't post problems in this folder without giving the ORIGINAL SOURCE of the problem -- i.e., the company or author that first produced the problem (not, for instance, a forum or other secondhand source on which it has previously been posted).
if you don't know the original source, then i'm sorry, but you can't post the problem here.
this applies to MGMAT problems as well -- there are over three thousand problems in our database, so we won't recognize all of them from memory.

we will delete this thread within a week if the original source of the problem is not posted. thanks.
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sanjeethbm
 Post subject: Re: * Coffee vending machine
 Post Posted: Wed Jun 15, 2011 2:01 am 
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Students


Posts: 12
These problems are from GMAT Prep Software downloaded from www.mba.com. I would appreciate on letting me know if any other clarifications are to be provided. I'm looking out for help in solving these problems.
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jnelson0612
 Post subject: Re: * Coffee vending machine
 Post Posted: Sun Jun 19, 2011 11:06 pm 
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ManhattanGMAT Staff


Posts: 1857
Hi sanjeet,
We'll be happy to help you if you'll repost to the forum in which we handle GMAT Prep problems: gmat-prep-math-f30.html

_________________
Jamie Nelson
ManhattanGMAT Instructor
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sanjeethbm
 Post subject: Re: * Coffee vending machine
 Post Posted: Tue Jun 21, 2011 4:28 am 
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Students


Posts: 12
Hi Jamie,

I have posted my query in the link mentioned by you. Looking forward for your reply.

- Sanjeeth
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jnelson0612
 Post subject: Re: * Coffee vending machine
 Post Posted: Thu Jun 23, 2011 8:12 pm 
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ManhattanGMAT Staff


Posts: 1857
Thanks Sanjeeth!

_________________
Jamie Nelson
ManhattanGMAT Instructor
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