Given an average rate how do I calculate how often to do something?
August 19, 2014 11:10 AM Subscribe
I get seed packets that (usually) give a germination rate. How do I calculate how many seeds to plant to give me a 'y' probability of getting 'z' seeds to germinate?
posted by sevenless to Science & Nature (8 answers total) 2 users marked this as a favorite
For example, my Bloomsdale spinach has a germination rate of 0.8. How many seeds should I plant to have a 90% chance of getting 25 seeds to germinate? I'd also like to know the confidence interval formula for this problem. I'm mainly interested in this as a programming exercise for myself. I know something about probability and statistics, but I'm not sure where to start on this.