Questions about the world of GMAT Math from other sources and general math related questions.
sanjeethbm
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* Coffee vending machine

by sanjeethbm Tue Jun 14, 2011 12:07 am

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
RonPurewal
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Re: Coffee vending machine

by RonPurewal Tue Jun 14, 2011 7:50 am

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

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sanjeethbm
Students
 
Posts: 12
Joined: Wed Dec 31, 1969 8:00 pm
 

Re: * Coffee vending machine

by sanjeethbm Wed Jun 15, 2011 2:01 am

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.
jnelson0612
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Re: * Coffee vending machine

by jnelson0612 Sun Jun 19, 2011 11:06 pm

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
sanjeethbm
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Posts: 12
Joined: Wed Dec 31, 1969 8:00 pm
 

Re: * Coffee vending machine

by sanjeethbm Tue Jun 21, 2011 4:28 am

Hi Jamie,

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

- Sanjeeth
jnelson0612
ManhattanGMAT Staff
 
Posts: 2664
Joined: Fri Feb 05, 2010 10:57 am
 

Re: * Coffee vending machine

by jnelson0612 Thu Jun 23, 2011 8:12 pm

Thanks Sanjeeth!
Jamie Nelson
ManhattanGMAT Instructor