Let X and Y have a trinomial distribution with parameters n=3, and . Find: a) E(X) b) E(Y) c) Var(X) d) Var(Y) e) Cov(X,Y) f) *Note that
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Originally Posted by antman Let X and Y have a trinomial distribution with parameters n=3, and . Find: a) E(X) b) E(Y) Similarly, c) Var(X) d) Var(Y) Similarly, e) Cov(X,Y) I'm not too sure about the Covariance. I'm tempted to say that its (Someone verify this... -_-) f) *Note that You're given enough information to find . Its just plug-n-chug from here... Does this make sense?
Originally Posted by Chris L T521 I'm not too sure about the Covariance. I'm tempted to say that its (Someone verify this... -_-) For one trial, , because both can't happen at the same time. Then, since in the trinomial distribution we have n independent trials, ( and )
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