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I measured hourly temperatures of site A and site B in June 2016 and June 2017. I used paired t-test to compare the means of site A & B for June 2016 (n=720) and p-value was 0.07 (significance level α = 0.05). Then i used paired t-test to compare the means of site A & B for June 2017 (n=720) and p-value was 0.0002 Now, if i want to compare the means of site A & B, using paired t-test, for June during 2016-2017, how can i do it?

case 1: Do i have to compare data of site A for June 2016-2017 (n=n(2016)+n(2017)=720+720=1440) and site B (n=1440) ?

No date-time Temp-Site A Temp-Site B
1 1-June-2016 1:00 23oC 24oC
2 1-June-2016 2:00 22oC 25oC
... ... ... ...
1440 30-June-2017 00:00 21oC 20oC

OR

case 2: Do i have to compare mean hourly data of 2016-2017 of site A (n=720) and mean hourly data of 2016-2017 of site B (n=720) ?

No date-time Mean Temp-Site A Mean Temp-Site B
1 1-June-(2016-2017) 1:00 23.2oC 24.6oC
2 1-June-(2016-2017) 2:00 22.8oC 25.1oC
... ... ... ...
720 30-June-(2016-2017) 00:00 21oC 21oC
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  • $\begingroup$ Welcome to CV. Since you’re new here, you may want to take our tour, which has information for new users. You are comparing site A and B, right? Are these different sites? If so, why do you use paired samples t-test? $\endgroup$
    – T.E.G.
    Nov 25, 2021 at 21:07
  • $\begingroup$ Hi, Site A is close to site B and i want to examin the impact of weather on the recorded mean temperatures of each site as a result of the different morphological characteristics of each site. $\endgroup$
    – netris
    Nov 26, 2021 at 13:06

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