question 3

-W' A psychologist examined the relation between hours of sleep deprivation (x) and performance on a driving task (y). The results are shown below. (8 points} Hours of Sleep Deprivation Performance on Driving Task 3?: 4.6 5,, = 1.1 What is the regression equation for predicting performance on the driving task from hours of sleep deprivation? (3 pts) Interpret the slope and y-intercept of the equation. (2 pts) lfsomeone has been kept up for 7 hours, what would you expect that his or her score on the task will be? (1 pts) If a person who was kept up for 7 hours actually scored g 75 on the test, find the residual value and state if the test over or under predicted their results. (2 pts) A researcher examines the correlations among three different tests and an outcome measure. The correlations are 1: r = .09, 2: r = -.68, and 3: r = .59. All else being equal, which ofthe correlations will produce an equation which will results in the most reliable predications? How do you know? (2 points]. Hint: Think about the model t