In a statistics course a linear regression was computed to predict length of stay (LOS) from the quality score of the hospital. The equation of the least squares regression line was Y = 7 - 0.5X, where Y represents the LOS in days and X the quality score. In what direction do the dependent and independent variables run? Referring to this equation, suppose a hospital's quality score is 4. What is the predicted value of the hospital's LOS?
In a statistics course a linear regression was computed to examine the relationship between length of stay (LOS) and RN/pt ratio. The equation of the least squares regression line was Y = 8 - 2X, where Y represents the LOS in days and X the RN/pt ratio. What is the meaning of -2X? What is the meaning of the 8?