Math Is Fun Forum

adzer

Member

Registered: 2008-01-15

Posts: 1

Is this possible?

Im just wondering would you maths geniuses be able to tell me about this histogram, It says the average is 7.2 but there are no votes above 8, so can this be possible or is it totally off the mark?

NullRoot

Member

Registered: 2007-11-19

Posts: 162

Re: Is this possible?

7.2 just at a glance certainly does seem to be a bit suspect.

I've derived the values as:
1 - 7
2 - 5
3 - 0
4 - 9
5 - 9
6 - 7
7 - 6
8 - 6
9 - 0
10 - 0

Which means that the average would be:
[(1*7) + (2*5) + (4*9) + (5*9) + (6*7) + (7*6) + (8*6)] / 49
[7 + 10 + 36 + 45 + 42 + 42 + 48] / 49
[230] / 49
4.694 (to four decimal places)

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Trillian: Five to one against and falling. Four to one against and falling… Three to one, two, one. Probability factor of one to one. We have normality. I repeat, we have normality. Anything you still can’t cope with is therefore your own problem.