I need help with this question please.
The random variable X is given by the sum of the scores when two ordinary dice are thrown.
i) i need to use the shape of the distribution to find E(X)=U
( but i dont know what i need to draw for that...)
From this i should also be able to valculate Var(X)=0^2
Finally i need to find P(X<U) and P(X>U+o) < could someone please tell what these mean and how to calculate .
You need to calculate the probability of the outcomes X=2, 3, ..., 12 by
Originally Posted by Chez_
counting how many of the 36 possible outcomes (when the dice are
distinguishable) give each score and then dividing by 36:
Once you have these probabilities your notes will tell you how to compute the
expectation and varianve etc.