Hi

For my dissertation I am looking at air temperature and light intensity effects on water temperature. 

I have 16000 induvidual pieces of data (temperature logged over 2 months, every 5 minutes) and when I do a kruskall wallace test, and even a one way ANOVA, all the P-values come out at 0.00, and this is because I have so much data. Only if I cut the amount of data I have down to 50 points so I suddenly get a P-value of 0.02.

Is this an error, or is it because I have so much data, Minitab is comfortably saying it is certain (in this case) that the medians, and the means of what I am calculating are statistically different?

Many thanks

Similar questions and discussions