Question: Assume that the mean systolic blood pressure of healthy adults is normally distributed with a mean \[\mu =120\] millimeters of mercury (mm Hg) and a standard deviation \[\sigma =5.6\] millimeters of mercury (mm Hg).

 If an individual healthy adult is selected at random, what is the probability that the individual’s blood pressure will be between 120 and 121.8 mm Hg?

 If a sample of 30 healthy adults is selected at random , what is the probability that their mean blood pressure will be between 120 and 121.8 mm Hg? Use the Central Limit Theorem .

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