I have a series of independent uptake rate (u) measurements at different times (2h, 4h, 6h, 24h) (n=3) and want to find the difference between the mean values for each time with standard deviation. Then I want to see that value per hour.
For the means this is easy: (mean u (4h)-mean u(2h))/2 = mean u/h (then the same for 6h-4h and so on)
I do not know how to make these calculations for the SD, I just know it is more complicated than this.
I would really appreciate some help as this is very important for my research, thank you!