Blood pressure is distribued Normally, with a mean of 85 mm and a standard deviation of 20 mm. As a research pysician you are randomly assigned 100 patients. What is the probability that the average blood pressure for your sample of 100 patients is less than 90 mm?

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Blood pressure is distribued Normally, with a mean of 85 mm and a standard deviation of 20 mm. As a research pysician you are randomly assigned 100 patients. What is the probability that the average blood pressure for your sample of 100 patients is less than 90 mm?

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Step 1

Introduction:

Denote X as the blood pressure of a randomly selected patient.

It is given that X has a normal distribution population mean μ = 85 mm, and population standard deviation σ = 20 mm.

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