# Answer on Statistics and Probability Question for PQ

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 period 2002, 2003 and 2004 to the period 2005 and 2006.

To do this would I use the averages for each period, or simply use the sums for each period. 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

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