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What is the distribution of n

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Grouping multinomial categories. Suppose that counts (N1, . . . Nm) are the rum-bets of results in m categories in n repeated trials. So (N1, . . . Nm) has multinomial distribution with parameters n and

p1, . . . pm as in the box above Example 7. Let 1 < i="">< j="">< m.="" answer="" the="" following="" questions="" with="" an="" explanation,="" but="" no="">

a) What is the distribution of N?

b) What is the distribution of Ni + Nj?

c) What is the joint distribution of Ni, and n - Ni -Nj?

Reference no: EM131796357

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