Suppose I flip n independent biased coins such that the jth coin has probability j/n of being heads, for j = 1, ..., n. Let Hn be a random variable equal to the total number of heads. (a) What is the expectation of Hn? (b) What is the variance of Hn? (c) Use Markov's inequality to derive an upper bound on P(Hn > 9n/10).

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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Suppose I flip n independent biased coins such that the jth coin has probability j/n of being
heads, for j
1,..., n. Let H, be a random variable equal to the total number of heads.
(a) What is the expectation of H,?
(b) What is the variance of Hn?
(c) Use Markov's inequality to derive an upper bound on P(H, > 9n/10).
Transcribed Image Text:Suppose I flip n independent biased coins such that the jth coin has probability j/n of being heads, for j 1,..., n. Let H, be a random variable equal to the total number of heads. (a) What is the expectation of H,? (b) What is the variance of Hn? (c) Use Markov's inequality to derive an upper bound on P(H, > 9n/10).
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