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Posted by on Tuesday, November 8, 2011 at 1:09am.

Assume that blood pressure readings are normally distributed with a mean of 123 and a standard deviation of
9.6. If 144 people are randomly selected, find the probability that their mean blood pressure will be less than 125

  • statistics - , Tuesday, November 8, 2011 at 10:18am

    Z = (mean1 - mean2)/SEm

    SEm = SD/√n

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

  • statistics - , Monday, March 19, 2012 at 10:58pm

    0.9938

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