SOLUTION: Suppose we have a set of blood pressures with a mean of 120 Systolic, and a sample standard deviation of 20 points. Assuming a normal distribution of Systolic blood pressures, bet

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Question 476296: Suppose we have a set of blood pressures with a mean of 120 Systolic, and a sample standard deviation of 20 points. Assuming a normal distribution of Systolic blood pressures, between what two values should 95% of all Systolic blood pressures lie?
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Answer by stanbon(75887) About Me  (Show Source):
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Suppose we have a set of blood pressures with a mean of 120 Systolic, and a sample standard deviation of 20 points. Assuming a normal distribution of Systolic blood pressures, between what two values should 95% of all Systolic blood pressures lie?
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Lower limit:
x = -1.96*20+120 = 80.8
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Upper limit:
x = 1.96*20+120 = 159.2
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Cheers,
Stan H.
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