To get a 4 you would have to sample a 2, you would have to sample a 2 from this distribution and we know that 2 is actually its 2 variences or two standard deviations from the mean, so its less likely and acutally thats - thats to get a 4 so to get an even larger numbers its going to be even less likely so thats why you see this shape over here. now when you have 2 degrees of freedom it moderates a little bit this is the shape for, this blue line right here is the shape of Q2 and notice that your are a little bit less likely to get values close to 0 and a little bit more liekly to get numbers further out but its still kinds shifted of weightrd towards small numbers then if we had another random variable and other chi-squared distributed random variable so then we have 