Hi,

I need to perform a paired sample t-test and I have the following data set:

2002 2003 2004 2005 2006
100 84 76 111 65
75 30 45 89 90
0 1 29 4 44
9 18 6 98 9
11 29 45 65 3
111 88 90 9 90
44 21 10 6 26

I wish to compare the three year period (2002, 2003 and 2004) to the two year period (2005 and 2006).
To do this would I use the averages for each period, or simply use the sums for each period i.e. Which set of data below would I use?

A
2002.03.04 2005/06
86.66667 88
50 89.5
10 24
11 53.5
28.33333 34
96.33333 49.5
25 16

B
2002.03.04 2005/06
260 176
150 179
30 48
33 107
85 68
289 99
75 32