12. ANOVA for Verbal SAT as a Predictor of GPAHow well does a student’s Verbal SAT score (on an 800-point scale) predict future college grade point average (on a four-point scale)? Computer output for this regression analysis is shown below, using the data in StudentSurvey. The regression equation is GPA=2.03+0.00189VerbalSAT Analysis of Variance Source DF SS MS F P Regression 1 6.8029 6.8029 48.84 0.000 Residual Error 343 47.7760 0.1393     Total 344 54.5788     VerbalSAT GPA 540 3.13 520 2.5 550 2.55 490 3.1 720 2.7 600 3.2 640 2.77 660 3.3 550 2.8 670 3.7 500 2.09 580   530 2.9 650 3.08 700   590 3.86 600 3 700 3 610 3.35 550 3.3 550 3.4 560 2.9 560 3.5 550 3 550 3.3 700 3.7 610 3.48 570 3.4 550 2.5 500 3.3 610 3.5 610 3.79 500 3.3 640 2.9 490 2.68 560 3.28 560 3.51 470 2.6 680 3.85 570 2.4 630 3.4 580 2.4 550 3 490 3.1 590 2.94 620 3.31 560 3.3 630 2.9 600 3.4 550 3.16 590   640 3.84 650 3.6 420 2.36 500 2.9 620 3 600 3.3 580 3.7 490 2.9 630 3.6 600 3.56 590 3.7 550 4 600 3.4 500   600 3.3 600 3.1 650 2.5 650 3.2 560 3.1 540 3.5 640 3 690 3.25 600 2.4 610 3.22 610   600   580 3.64 560 3.5 620 2.5 620 3.4 630   430 3.25 640 3.7 490 2.1 550 2.8 690 3.49 550 3.83 600   530 2.7 520 2.8 660 3.13 800 3.62 560 2 610 3.6 660 4 650 3.1 680 2.6 550 3.7 660 3.57 650 2.9 620 3.15 530 3.88 670 3.5 640 2.8 680   670 2.9 730 3.21 580 3.5 610 3.33 580 3 620 3.5 680 3.95 570 2.1 500 3 800 3 610 3.75 550 2.5 600 3.4 660 3.4 640 3.14 560 2.6 600 3.4 480 2.7 650 3.15 520 2.2 640 3.5 610 2.9 450 2.5 700 3.5 540 3.6 550 3.1 640 3 560 3 530 3.8 620 3.15 550 2.75 520 2.8 660 3 470 3.1 570 2.27 560 2.8 520 3.02 560 2.93 600 3.2 400 3 540 3 400 2.7 530 3.2 530 2.9 517 3 620 2.72 590 3.3 590   620 2.22 540 3.26 490 3.5 540 3.1 640 3.3 620 3.29 680   800 3.69 510 2.65 620 3.25 670 2.8 560 3.36 630 2.97 590 3.31 630 3.05 470 2.2 550 3.3 690 3.45 660 3.83 600 3 700 3.35 660 2.4 540 3.1 520 3.4 550 2.82 600 2.9 600 3.4 520 3.2 490 3.2 600 3.8 620 3.57 530 3.33 550 2.9 600 3.2 610 3.1 550 3.25 560 3.4 670 3.8 610 3.38 660 3.88 630 2.75 520 2.9 670 3.6 550 2.8 560 2.2 390   600 3.3 560 2.85 610 3.37 710 3.5 710 3.55 560 3.2 600 2.47 540 2.72 600 3.4 600   550 3.4 550 3.1 620 3.1 550 2.94 570 3 530   570 3.6 620 3.6 520 3.5 620 3.4 520 3.5 680 3 630 2.75 730 3.56 440 2.7 670 3.68 500 3.5 630 3.5 680 3.4 530 2.6 630 3.25 600 3.3 700 3.2 590 2.9 670 3.85 780 3.4 660 3.4 600   510 2.7 800 3.81 740 3.4 780 3.23 440 3.1 700 2.89 660 2.81 520 3 600 3.77 760 3.3 680 3 520 2.9 510 3.5 600 3.6 650 3.7 700 3.2 650 2.87 520 3.3 580 3.3 600 3.45 520 3.1 750 3.71 650 3.3 550 3.3 650   640 3.73 660 3.13 640 3.89 530 3.05 690 3.2 630 3.25 600 2.9 560 3 720 3.5 610 3.5 720 3.6 590 3.4 620 3.25 550 2.7 800 3.78 670 4 550 3 620 3.3 520 2.8 440 2.5 720 3.5 390 2.8 560 3.4 570 3 660 3.27 620 3.5 660 3 630 3.6 610 3.25 540 3 570 2.75 600 2.9 600 3 530 3 560 2.9 560 3.36 500 3.25 560 3.5 500 2.76 640   660 2.75 550 3.25 630 3 700 2.8 560 3.4 580 3.25 800 3.5 460 3.05 700 3.18 660 3 500 2.23 600 3.4 650 3.3 640 3.43 620 3.88 570 3.45 540 3 670 3 620 3.18 650 2.2 560 3.29 480 3.5 460 2.8 500 2.9 680 3.5 550 2.5 630 3.25 620 2.9 560 3.66 590 3.01 530 2.25 690 3.2 550 3.35 600 3 610 3 600 3.48 750 2.88 470 2.6 550 2.75 540 3.3 530 3.25 540 3.3 680 3.2 510 2.6 500 3 680 3.25 500 3.3 570 3.25 540 2.83 550 3.3 680 3.6 630 3.7 650 2.83 680 3.3 550 3.44 600 3 540 3.27 550 2.3 500 2.6 (a) What is the predicted grade point average of a student who receives a 510 on the verbal SAT exam?Round your answer to two decimal places. (b) Use the information in the ANOVA table to determine the number of students included in the dataset. (c) Use the information in the ANOVA table to compute R2.Round your answer to one decimal place.

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12. ANOVA for Verbal SAT as a Predictor of GPA

How well does a student’s Verbal SAT score (on an 800-point scale) predict future college grade point average (on a four-point scale)? Computer output for this regression analysis is shown below, using the data in StudentSurvey.


The regression equation is GPA=2.03+0.00189VerbalSAT
Analysis of Variance
Source DF SS MS F P
Regression 1 6.8029 6.8029 48.84 0.000

Residual Error

343 47.7760 0.1393    
Total 344 54.5788    
VerbalSAT GPA
540 3.13
520 2.5
550 2.55
490 3.1
720 2.7
600 3.2
640 2.77
660 3.3
550 2.8
670 3.7
500 2.09
580  
530 2.9
650 3.08
700  
590 3.86
600 3
700 3
610 3.35
550 3.3
550 3.4
560 2.9
560 3.5
550 3
550 3.3
700 3.7
610 3.48
570 3.4
550 2.5
500 3.3
610 3.5
610 3.79
500 3.3
640 2.9
490 2.68
560 3.28
560 3.51
470 2.6
680 3.85
570 2.4
630 3.4
580 2.4
550 3
490 3.1
590 2.94
620 3.31
560 3.3
630 2.9
600 3.4
550 3.16
590  
640 3.84
650 3.6
420 2.36
500 2.9
620 3
600 3.3
580 3.7
490 2.9
630 3.6
600 3.56
590 3.7
550 4
600 3.4
500  
600 3.3
600 3.1
650 2.5
650 3.2
560 3.1
540 3.5
640 3
690 3.25
600 2.4
610 3.22
610  
600  
580 3.64
560 3.5
620 2.5
620 3.4
630  
430 3.25
640 3.7
490 2.1
550 2.8
690 3.49
550 3.83
600  
530 2.7
520 2.8
660 3.13
800 3.62
560 2
610 3.6
660 4
650 3.1
680 2.6
550 3.7
660 3.57
650 2.9
620 3.15
530 3.88
670 3.5
640 2.8
680  
670 2.9
730 3.21
580 3.5
610 3.33
580 3
620 3.5
680 3.95
570 2.1
500 3
800 3
610 3.75
550 2.5
600 3.4
660 3.4
640 3.14
560 2.6
600 3.4
480 2.7
650 3.15
520 2.2
640 3.5
610 2.9
450 2.5
700 3.5
540 3.6
550 3.1
640 3
560 3
530 3.8
620 3.15
550 2.75
520 2.8
660 3
470 3.1
570 2.27
560 2.8
520 3.02
560 2.93
600 3.2
400 3
540 3
400 2.7
530 3.2
530 2.9
517 3
620 2.72
590 3.3
590  
620 2.22
540 3.26
490 3.5
540 3.1
640 3.3
620 3.29
680  
800 3.69
510 2.65
620 3.25
670 2.8
560 3.36
630 2.97
590 3.31
630 3.05
470 2.2
550 3.3
690 3.45
660 3.83
600 3
700 3.35
660 2.4
540 3.1
520 3.4
550 2.82
600 2.9
600 3.4
520 3.2
490 3.2
600 3.8
620 3.57
530 3.33
550 2.9
600 3.2
610 3.1
550 3.25
560 3.4
670 3.8
610 3.38
660 3.88
630 2.75
520 2.9
670 3.6
550 2.8
560 2.2
390  
600 3.3
560 2.85
610 3.37
710 3.5
710 3.55
560 3.2
600 2.47
540 2.72
600 3.4
600  
550 3.4
550 3.1
620 3.1
550 2.94
570 3
530  
570 3.6
620 3.6
520 3.5
620 3.4
520 3.5
680 3
630 2.75
730 3.56
440 2.7
670 3.68
500 3.5
630 3.5
680 3.4
530 2.6
630 3.25
600 3.3
700 3.2
590 2.9
670 3.85
780 3.4
660 3.4
600  
510 2.7
800 3.81
740 3.4
780 3.23
440 3.1
700 2.89
660 2.81
520 3
600 3.77
760 3.3
680 3
520 2.9
510 3.5
600 3.6
650 3.7
700 3.2
650 2.87
520 3.3
580 3.3
600 3.45
520 3.1
750 3.71
650 3.3
550 3.3
650  
640 3.73
660 3.13
640 3.89
530 3.05
690 3.2
630 3.25
600 2.9
560 3
720 3.5
610 3.5
720 3.6
590 3.4
620 3.25
550 2.7
800 3.78
670 4
550 3
620 3.3
520 2.8
440 2.5
720 3.5
390 2.8
560 3.4
570 3
660 3.27
620 3.5
660 3
630 3.6
610 3.25
540 3
570 2.75
600 2.9
600 3
530 3
560 2.9
560 3.36
500 3.25
560 3.5
500 2.76
640  
660 2.75
550 3.25
630 3
700 2.8
560 3.4
580 3.25
800 3.5
460 3.05
700 3.18
660 3
500 2.23
600 3.4
650 3.3
640 3.43
620 3.88
570 3.45
540 3
670 3
620 3.18
650 2.2
560 3.29
480 3.5
460 2.8
500 2.9
680 3.5
550 2.5
630 3.25
620 2.9
560 3.66
590 3.01
530 2.25
690 3.2
550 3.35
600 3
610 3
600 3.48
750 2.88
470 2.6
550 2.75
540 3.3
530 3.25
540 3.3
680 3.2
510 2.6
500 3
680 3.25
500 3.3
570 3.25
540 2.83
550 3.3
680 3.6
630 3.7
650 2.83
680 3.3
550 3.44
600 3
540 3.27
550 2.3
500 2.6

(a) What is the predicted grade point average of a student who receives a 510 on the verbal SAT exam?
Round your answer to two decimal places.

(b) Use the information in the ANOVA table to determine the number of students included in the dataset.

(c) Use the information in the ANOVA table to compute R2.
Round your answer to one decimal place.

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