Question: 6.3.7 Let X , be the difference (possibly negative) between the number of heads and the number of tails in n tosses of a coin.

6.3.7 Let X , be the difference (possibly negative) between the number of heads and the number of tails in n tosses of a coin. Find: (i) The distribution of Xq. (ii) The cdf of X, at point z = -0.6. (iii) The probability that X, is positive given that it is nonnegative for

(a) n = 4 and

(b) n = 5.

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