Okay, so as a professional biologist it pains me to admit this, but I know little to nothing about statistics. I can do a Chi-squared analysis on Mendelian ratios and a Mann-Whitley U-test for a single parameter, but that’s about it.
So I currently have a data set that has two parameters - age of the mouse embryo, and length of a particular tissue - with three different mutant genotypes. When I do a scatter plot of the data, it looks like this. The different colors represent different genotypes (I had Excel add “Trend lines”, whatever the hell those are.)
So, to my eye, there is no difference between the different genotypes (colors), but I need someone to point me towards the right test to use to actually get a p-value out of that subjective judgment. Anyone want to lend a hand?