Chapter 23.4, Problem 1JC

Researchers in Food Science studied how big people’s mouths tend to be. They measured mouth volume by pouring water into the mouths of subjects who lay on their backs. Unless this is your idea of a good time, it would be helpful to have a model to estimate mouth volume more simply. Fortunately, mouth volume is related to height. (Mouth volume is measured in cubic centimeters and height in meters.)

The data were checked and deemed suitable for regression. Take a look at the computer output. (Data in Mouth_volume)

1. What does the t-ratio of 3.27 for the slope tell about this relationship? How does the P-value help your understanding?