I performed a regression analysis with two datasets, each of which has size 50. One dataset is called Spatial % and the other Min values, and I wanted to check whether the two are correlated. I did the analysis in SPSS and the resulting scatterplot is as follows:I am not that much experienced but it seems to me that a line is not the perfect fit for this scatterplot. Would a power line fit better? Or what else do you suggest?
Non-linear regression line fit
regression;correlation
I tried to estimate a few of your data values from the scatter plot you provided.Then I performed a power model regression and came up with$y = (5.777 \cdot 10^{-16}) \cdot 1.404^{x}.$The estimated values I used are below.$(70, 0.01), (75, 0.012), (80, 0.015), (90, 0.025), (95, 0.075), (98, 0.15), (99, 0.20), (99.5, 0.25), (99.9, 0.32)$Of course, your actual model will differ because you have the actual data set. I just eyeballed a few points so I could test the power fit.