Question: 1. If X ~ N(u = 70, 02 = 100), find (a) P(65 pnorm (85, mean=70, sd=10)-pnorm (65, mean=70, sd=10) [1] 0. 6246553 (b) The

1. If X ~ N(u = 70, 02 = 100), find (a) P(65 pnorm (85, mean=70, sd=10)-pnorm (65, mean=70, sd=10) [1] 0. 6246553 (b) The 85th percentile of X, i.e. the constant c such that P(X qnorm ( . 85, mean=70, sd=10) [1] 80. 36433

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