We are testing if a computer's performance increases after its OS update by comparing the performance of 10 different Programs before and after the update which results in:
- Program: #1 #2 #3 #4 #5
- before: 34 29 32 27 28
- after: 32 34 36 27 28
now we should do a t-test by calculating t on our own and only the p-value using the qt-function in R. But how do I have to use the qt-function to get my p-value?
I calculated t and it is -0,6486 (t.test in R says -0.64854 so close enough) and df is 8