Question: 6.9 Given the normally distributed variable X with a mean of 20 and standard deviation of 2, find (a) P(X < 16); (b) the value

6.9 Given the normally distributed variable X with a mean of 20 and standard deviation of 2, find

(a) P(X < 16);

(b) the value of k such that P(X < k) = 0.4090;

(c) the value of k such that P(X > k) = 0.8599;

(d) P(17 < X < 22).

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