SOLUTION: Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 6.4. If 25 people are randomly selected, find the probability that their
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Question 1159159: Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 6.4. If 25 people are randomly selected, find the probability that their mean blood pressure will be less than 126. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z=(x bar-mean)/sigma/sqrt(n)=(126-124)/6.4/sqrt(25)
z=(2)*sqrt(25)/6.4
=1.5625
probability z <1.5625 is 0.9409
