D Question 22 2 pts A value of R-square that is close to zero indicates which of the following about a simple regression model? A small percentage of the variation in the dependent variable is explained by the model O The variance of the dependent variable is small On average, changes in the independent variable lead to small changes in the dependent variable The vertical distance of data points from the fitted line is small, on average Next Previous Not saved Submit QuizD Question 24 2 pts A firm believes that the number of units an employee can process per hour depends on how long that employee has been with the firm. A regression model between units-per-hour (Y) and years-at-firm (X) results in the equation Y = 13 + 6*X. If years-at-firm increases by 3 units, what is the expected increase in units-per-hour? O 31 19 18 0 6 Next Not saved Submit QuizD Question 25 2 pts A firm believes that the number of units an employee can process per hour depends on how long that employee has been with the firm. A regression model between units-per-hour (y) and years-at-firm (x) results in the equation y= 13+ 6x . If years at firm is equal to 5.5, what is the expected value for units-per-hour? O 12 O 29 46 107 Nel