Let X represent the positive difference between the scores obtained from two dice.Consider the absolute difference; an example of a positive difference is |2-6|=4. Zero is considered a positive difference.
a) Find the probability mass function for X. b) Show that X follows a valid probability mass function. c) Find
d) Find μx
e) Find σx^2
1: 0 1 2 3 4 5 2: 1 0 1 2 3 4 3: 2 1 0 1 2 3 4: 3 2 1 0 1 2 5: 4 3 2 1 0 1 6: 5 4 3 2 1 0
Counts: 0: 6 1: 10 2: 8 3: 6 4: 4 5: 2
mean: 70/36 = 35/18 second moment: 210/36 = 105/18 variance = second moment - mean squared = 2.0524691358
All math was done in my head except the last one, and fairly quickly - so I'd suggest you double check. Not sure what c was asking.
LOL downvoted? Just cuz you cant solve it? Common i need a genius here to tackle this question for me. And in the end you will see how this equation relates to league. Its a suprise!
Found the UOIT student.
