The number of hours spent online during a weekend and the score on the test on the following Monday for each of 12 students are given below hours spent online(x) 0 1 2 3 3 5 5 5 6 7 7 10 Test scores (y) 96 85 82 74 95 68 76 84 58 65 75 50 1. Suppose the regression line for the above ( hours online and scores on test) data is: ? = -4.07x + 93.97 . What would you predict to be the test score for a student who spend 9 hours online during the weekend prior? [ Select ] 2. In the equation of the regression line ? = -4.07x + 93.97 if x increases by one unit, then [ Select ]
Added by Anna J.
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To predict the test score for a student who spends 9 hours online during the weekend prior, we substitute x = 9 into the regression equation: y = -4.07(9) + 93.97 = -36.63 + 93.97 = 57.34. So, we would predict the test score to be approximately 57. Show more…
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