Question
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
9.6. If 144 people are randomly selected, find the probability that their mean blood pressure will be less than 125
Answers
PsyDAG
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.
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.
Anonymous
0.9938