An article on the Amican Journal of Public Health reported on a study to investigate the relationship between school start time and adolescent sleep patterns.' The researchers used linear regression methods, including simple linear regression to analyze these data. Here are some adapted linear regression results from this study: 9 = 30 + 81x1, where y = typical weeknight sleep duration in minutes, and x: = school start time, measured as the number of minutes after 7 AM that the school starts. (So for example for 7:30, 3:1: 30; for 8:15, 11 = 75 etc..) The estimates and standard errors for the regression slope is: 31 = 0.47; 55(31) = 0.12 Bo = 433.9; 55(30) = 5.1