The standard procedure to reduce abnormally rapid heartbeats in humans is called the “diving reflex.” This entails briefly submerging the patient’s face in cold water. The reflex, triggered by cold water temperatures, is an involuntary neural response that shuts off circulation to the skin, muscles, and internal organs to divert extra oxygen-carrying blood to the heart, lungs, and brain. A research physician conducted an experiment to investigate the effects of various cold water temperatures on the pulse rate of seven 6-year-old children. The temperature of the water (°F) is the explanatory variable, and the decrease in pulse rate (beats per minute) is the response variable. Here is computer output for a regression analysis