## 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?

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)

ph14

Posts: 3227
Joined: Mon Sep 12, 2011 11:15 pm

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

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?

DAMN!

thanks!

ph14

Posts: 3227
Joined: Mon Sep 12, 2011 11:15 pm

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

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?

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

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

Dogg

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

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

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 ?