Score Number of People

0 - 4 0

5 - 9 0

10 - 14 0

15 - 19 2

20 - 24 4

25 - 29 2

30 - 34 10

35 - 39 10

40 - 44 23

45 - 49 25

50 - 54 33

55 - 59 32

60 - 64 41

So to work out the mean score if we take the last line it would be ((60+64)/2)*41 this would then need to be repeated for every row added together and divided by the number of people.

Any help appreciated