How do you figure out the score distribution in your class?

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Connor Benz
Posts: 113
Joined: Wed Sep 04, 2013 10:49 pm

How do you figure out the score distribution in your class?

Postby Connor Benz » Fri Nov 01, 2013 10:40 pm

I am horrible at math and we just received our midterm grades. I am trying to figure out how many people got which score in the class. All I know is the mean.

For example:
50 students
Average score: 72

How would I figure out how many people got this score? (I'm assuming it would be 25)

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ph14
Posts: 3224
Joined: Mon Sep 12, 2011 11:15 pm

Re: How do you figure out the score distribution in your class?

Postby ph14 » Fri Nov 01, 2013 10:51 pm

Connor Benz wrote:I am horrible at math and we just received our midterm grades. I am trying to figure out how many people got which score in the class. All I know is the mean.

For example:
50 students
Average score: 72

How would I figure out how many people got this score? (I'm assuming it would be 25)


You can't figure out your distribution from just the mean.

For example, a mean of 5:

It could be 5 and 5
It could be 4 and 6
It could be 3 and 7.

You just can't tell from only that information.

Connor Benz
Posts: 113
Joined: Wed Sep 04, 2013 10:49 pm

Re: How do you figure out the score distribution in your class?

Postby Connor Benz » Fri Nov 01, 2013 10:57 pm

DAMN!

thanks!

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ph14
Posts: 3224
Joined: Mon Sep 12, 2011 11:15 pm

Re: How do you figure out the score distribution in your class?

Postby ph14 » Fri Nov 01, 2013 11:00 pm

Connor Benz wrote:DAMN!

thanks!


No problem. Good luck.

POTUS2044
Posts: 79
Joined: Tue Nov 27, 2012 10:30 pm

Re: How do you figure out the score distribution in your class?

Postby POTUS2044 » Sat Nov 02, 2013 12:22 pm

http://en.wikipedia.org/wiki/Normal_distribution

this is probably your best approximation if you know absolutely nothing else about the distribution

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Dogg
Posts: 103
Joined: Thu Sep 19, 2013 8:44 am

Re: How do you figure out the score distribution in your class?

Postby Dogg » Sat Nov 02, 2013 12:46 pm

Connor Benz wrote:I am horrible at math and we just received our midterm grades. I am trying to figure out how many people got which score in the class. All I know is the mean.

For example:
50 students
Average score: 72

How would I figure out how many people got this score? (I'm assuming it would be 25)

prof didn't give the top score ?




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