Hello all! This question will likely reveal my lack of basic statistics knowledge, but I can't seem to find the answer in textbooks or on this forum. To wit:
My grad project involves cutting fragments from leaves, and growing fungi out of them. Anywhere from 15% to 90% of fragments produce fungi, depending on the plant species the leaf came from. What I want to do is evaluate the significance of those differences between plant species. Say I have 1000 leaf fragments from species A, of which 100 grew fungi; and 700 leaf fragments from species B, of which 140 grew fungi (in total, I'll have about 15 plant species with varying numbers of leaf fragments). Each data-point is just a yes or no (0 or 1), so in the end the relevant quantity is the proportion of leaf fragments that grew fungi, for each plant species. But I can't just analyze those proportions, right? The sample size has to be incorporated somehow, to get at significance. What's the right test for this, and how do I do it?
Thank you so much for your time, and for any help you're able to offer!
My grad project involves cutting fragments from leaves, and growing fungi out of them. Anywhere from 15% to 90% of fragments produce fungi, depending on the plant species the leaf came from. What I want to do is evaluate the significance of those differences between plant species. Say I have 1000 leaf fragments from species A, of which 100 grew fungi; and 700 leaf fragments from species B, of which 140 grew fungi (in total, I'll have about 15 plant species with varying numbers of leaf fragments). Each data-point is just a yes or no (0 or 1), so in the end the relevant quantity is the proportion of leaf fragments that grew fungi, for each plant species. But I can't just analyze those proportions, right? The sample size has to be incorporated somehow, to get at significance. What's the right test for this, and how do I do it?
Thank you so much for your time, and for any help you're able to offer!