I would like to compare four slopes I got from linear fits through five data points for each fit. The fitting results (for the slopes) are as follows:
1: 0.08885 0.00991
2: 0.08744 0.0118
3: 0.10288 0.00669
4: 0.0926 0.01285

My hypothesis is that they are all not significantly different from each other and I would like to put that into a number. Can I run an unpaired t-test putting N=5? I guess I should loose a degree of freedom due to the linear fit. Or are there other tests better suited for this problem? Thanks a lot for your help in advance.