Chapter 4.1, Problem 37E

Blood pressure: A blood pressure measurement consists of two numbers: systolic pressure, which is the maximum pressure taken when the heat is contracting, and the diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in millimeters of mercury, for a sample of 16 adults. The following table presents the results.

1. Construct a scatterplot of die diastolic blood pressure (y) versus the systolic blood pressure (x).
2. Compute the correlation coefficient between systolic and diastolic blood pressure.
3. If someone’s diastolic pressure is above average, would you expect that person’s systolic pressure to be above or below average? Explain.