Researchers at a pharmaceutical company hold found that the influential time duration of a nontoxic dosage of dull pain?
a) What is the probability that the drug will be potent for 2 hours or less?
b) What is the probability that the drug will be important for 1 hour or less?
c) What is the probability that the drug will be influential for 3 hours or more?
Answers:
a) P(t ≤ 2) = 0.50
b) z(t ≤ 1) = (1 - 2)/0.3 ≈ - 3.3333σ
P(t ≥ 1) ≈ 0.999571
P(t ≤ 1) ≈ 0.000429
c) P(t ≥ 3) ≈ 0.000429
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