Recent content by newbiewannabe

For small dx isn't that just the pdf of x. P(X+Y<z) = P(X<z-Y) = F(z-Y) I don't know how that helps though, assuming I'm correct.

Homework Statement As the title indicates. I'm given two independent exponential distributions with means of 10 and 20. I need to calculate the probability that the sum of a point from each of the distributions is greater than 30. Homework Equations X is Exp(10) Y is Exp(20) f(x) =...

Okay sounds good. I think I got it figured out. Thanks for your help.

So is the way I did it at first correct?

Homework Statement I'm given data for 5 years of number of accidents. The problem asks about the Variance of the empirical distribution of the number of accidents per year. Homework Equations The Attempt at a Solution I'm not sure what an empirical distribution means. I wasn't...