In: Statistics and Probability
For the questions on this project assume that the mean systolic blood pressure of adults in
America is 120 millimeters of mercury (mmHg) with a standard deviation of 5.6 mmHg. Also
assume the variable is normally distributed.
1) Your company develops a new treatment for high blood pressure. You want to test it on
people who are in the 90th
percentile or higher (people who have a higher systolic blood
pressure than 90% of other Americans). What is the cut-off blood pressure for this group –
what is the lowest systolic blood pressure a person could have to be considered for this trial?
2) In a group of 1,000 randomly selected adult Americans, about how many do we expect to
have a systolic blood pressure of 110 mmHg or less