3. Systolic blood pressure experiment A pilot experiment was run by John Spitak in 1987 to investigate the effect of jogging on systolic blood pressure. Only one subject was used in the pilot experiment, and a main experiment involving a random sample of subjects from a population of interest would need to be run in order to draw more general conclusions. The subject jogged in place for a specified number of seconds and then his systolic blood pressure was measured. The subject rested for at least 5 minutes, and then the next observation was taken.

The data and their order of observation are given in Table 8.12.