Question

Foot ulcers are a common problem for people with diabetes. Higher skin temperatures on the foot indicates an increased risk of ulcers. IN a study carried out at the Colorado School of Mines, skin temperatures on both feet were measured , in degrees Fahrenheit, for 18 diabetic patients. The data are presented in the table below:

Left Foot	80	85	75	88	89	87	78	88	89	76	89	87	78	80	87	86	76	88
Right Foot	80	85	80	86	87	82	78	89	90	81	86	82	78	81	82	85	80	89

Calculate the correlation between the temperature measurements on both feet.

If a linear model were fit to these data, treating the right foot temperature measurement as the response variable, what would be the test statistic when testing whether or not the slope of the model is equal to zero?

If a linear regression model were fit, what is the value of the slope and the value of the y-intercept? Treat the right foot temperature measurement as the response variable.

Answer 1