Specifically, I want to test the randomness of the php rand(1, 750) function given 750 unique values 1-750, and determine the expected level of duplicate values give a certain number of same times the rand() function is ran. So, if I run the rand() php function 1500 times, I should be see x number of duplicate values. Then, I want to compare that to historical data I have complied from a program I wrote which utilized the rand() php function.