Question: Problem 6.19 A random sample of size 9 is taken from a normal distribution = 15 and unknown. Suppose s = 1.613. Find:

Problem 6.19 A random sample of size 9 is taken from a normal distribution µ = 15 and σ unknown. Suppose s = 1.613. Find:

(a) P(14 < X < 16);

(b) P(13.76 < X < 16.24);

(c) P(13.20 < X < 16.80).

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