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Let X1, X2, .., Xn be a random sample from Binomial(1,p) (i.e. n Bernoulli trials). Thus, п Y- ΣΧ i=1 is Binomial (n,p). a. S

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het x.... X and Bin (1 ) with E(Xi) = p of var(xi) a bet & 121,2...n and y: Exim Bin (n.) (9). 8=EX E(X) = e ) p p : E1 X 24

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