Tray
Hopeless optimist
Can I point out that, as a maths teacher, I find this particular poll very interesting. Calculating the mean from, essentially, a frequency table with grouped data. It satisfies my 'when am I ever gonna need this?' Question I receive daily.
I will also point out that, assuming the OP will be using the midpoint of each class as an estimate, the result will, in fact be only an estimate. I'm sure the OP will also have no problems in calculating the error intervals wand standard deviations as well.
Oh, and by the way, I am 25. After reading my post back, an extremely borIng 25 at that.
Same haha, may use this in a lesson, get them lot to work it out for us
