Statistics Help
Question: PSA data from a population of 40 – 65 year old men is approximately Normally distributed with µ = 3.6 ng/mL and σ of 0.35 ng/ml. What is the probability of selecting someone with a PSA level less than 3 ng/mL. Edit
Answer: z=(x-bar - µ)/SD
=(3-3.6)/0.35
=-1.71
So, P(x-bar < 3 ng/mL)
=P(z < -1.71)
= 0.5 – P(0 < Z < 1.71)
=0.5 – .4564
=0.0436 (Ans.) Edit
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