# Intermediate 2 Mathematics - Statistics Question: Help? Tweet

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1. Intermediate 2 Mathematics - Statistics Question: Help?
I was wondering whether someone on here could walk me through this question? It's the last question in the 2004 calculator paper. It's worth 5 marks so I'm not really sure where to start..

I can't upload photos to my threads for some reason, the question is here: http://tinypic.com/view.php?pic=315xr9u&s=6
Last edited by nerd434; 17-05-2012 at 21:48.
2. Re: Intermediate 2 Mathematics - Statistics Question: Help?
Been some time - but for sake of consistancy and to help future students i'll try to explain:
This is what statisticians call Discreet grouped data - it is fair to assume that the mean on each interval is representative of the actual grouped data:
Rewrite table to work out means..

mean number of days absence =

Although the days were quoted as whole days absence it is permissable to quote fractional means!
Last edited by tomctutor; 28-12-2012 at 20:33.