The following data are ordered systolic blood pressures in millimeters of mercury (mmHg) from 48 young adult males:
(a) Compute the mean and standard deviation using the formulas given in this book. Check your results by entering the data into a statistical package and obtain their results for the means and standard deviations.
(b) Compute the median and quartiles.
(c) Display a histogram and a box plot of the data above using a statistical package. Check if your median and quartiles coincide with the box plot obtained from a statistical package.
(d) State whether or not you think the data follow a symmetric distribution, and give the reason for your answer.
(e) Which observations might you check to see if they were outliers?