# Talk

## Can anyone help with a MATHS type question, Stastics??

(22 Posts)
drosophila Thu 25-May-06 19:53:36

I thought it was simple until I saw what some one else has done and now I don't understand it. If anyone can help I will post the problem but I will have to get my calculator.

drosophila Thu 25-May-06 20:10:48

Off course I meant statistics. Any maths types out there?

cece Thu 25-May-06 20:11:35

what age - primary I can od but not secondary.

FillyjonktheSnibbet Thu 25-May-06 20:11:55

probably not , what level? post it and we'll see.

thewomanwhothoughtshewasahat Thu 25-May-06 20:12:06

depends how hard. try us. I'm sure someone can help

tissy Thu 25-May-06 20:16:29

well I did maths O level- what's the problem

Oblomov Thu 25-May-06 20:24:43

What is the question ?

drosophila Thu 25-May-06 20:28:49

OK here goes. It's actually to do with my work and ot has been driving me crazy. Imagine this:

Month No.sick days No of pupils Ave per pupil
Jan 10 100 .01
Feb 9 101 .089
Mar 5 98 .057

If i want to work out the average sick day per pupil for the 3 mths I simply added the no of sick days up for 3 mths =24
then devided it by the total for no of pupils =299
answer being 0.80. Alternatively I would have added the right hand column up and devided by 3.

Do you think this is correct. If you do I will show you what someone else did.

drosophila Thu 25-May-06 20:29:37

I had a lovely table which didn't translate to well when I posted I will try again.

gothicmama Thu 25-May-06 20:31:14

yes sounds rightto me

drosophila Thu 25-May-06 20:31:40

Month No.sick days No of pupils Ave per pupil
Jan 10 100 .01
Feb 9 101 .089
Mar 5 98 .057

drosophila Thu 25-May-06 20:32:11

Can't get the table working.

thewomanwhothoughtshewasahat Thu 25-May-06 20:33:25

hmmm kind of depends - are they (give or take a couple) the same pupils?

drosophila Thu 25-May-06 20:34:34

Month No of Sick Days No of Pupils Ave sick Per pupil
Jan 10 100 .01
Feb 9 101 .089
Mar 5 98 .057

FillyjonktheSnibbet Thu 25-May-06 20:35:05

same pupil group over dif months, or dif pupils?

drosophila Thu 25-May-06 20:35:15

Sorry about table. Yes essentally the same pupils.

drosophila Thu 25-May-06 20:39:06

How another person did it was to add all the pupils up and devide by 3 to get the average no of pupils 99.6 and then using the actual sick for 3 mths of 24. So 99.6 devided by 24 =4.15.

Jasnem Thu 25-May-06 20:40:50

Are you sure March isn't 0.051?
Also, unlessI'm doing something wrong, adding the right hand column and dividing by 3 gives a different answer (0.052, or0.05, depending on March figure)

drosophila Thu 25-May-06 20:44:08

You are right. 0.051
I am sitting in the dark and can't see calculator properly.

drosophila Thu 25-May-06 20:46:53

Have to go now but will check later. Many thanks for pondering it for me. I am tired and need to give my brain a rest.

Twiglett Thu 25-May-06 20:49:22

Month No of Sick Days No of Pupils Ave sick Per pupil
Jan 10 100 .01
Feb 9 101 .089
Mar 5 98 .057

So

In January 100 pupils had 10 days off = 0.1 days per child
In February 101 pupils had 9 days off = .089 days per child
In March 98 pupils had 5 days off = 0.05 days per child

Across 3 months there are ave 99.7 pupils having average 8 days off = 0.08 per child (8%)

Oblomov Thu 25-May-06 21:00:23

Depends how you do it.
1)Days = 10 + 9 + 5 = 24
pupils = 100 + 98 +101 = 299
24 / 299 = 0.08 = 8%

2)10 / 100 = 0.10
9/101 = 0.09
5/98 = 0.06

0.10 + 0.09 +.06 =.25 / 3 = 0.09 = 9%

There are many different ways of doing this calculation.
Once you choose one way, stick to it.
If the previous person did it by means of one calculation....use the same.

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