A SAT prep course claims to increase student scores by more than 60 points, on average. To test this claim, 9 students who have previously taken the SAT are randomly chosen to take the course. Their SAT scores before and after completing the prep course are listed in the following table. Test the claim at the 0.01 level of significance. prep

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A SAT prep course claims to increase student scores by more than 60 points, on average. To test
this claim, 9 students who have previously taken the SAT are randomly chosen to take the prep
course. Their SAT scores before and after completing the prep course are listed in the following
table. Test the claim at the 0.01 level of significance.
SAT Scores
1170 1200 | 1040 | 1280 || 1450 1470 | 1500
Before Prep Course | 1010
980
After Prep Course
1100 | 1260 1190 | 1280 | 1170 | 1370 1440 1500 1520
280 | 20
80 |
130 90
Difference
90
10
30
20
Transcribed Image Text:A SAT prep course claims to increase student scores by more than 60 points, on average. To test this claim, 9 students who have previously taken the SAT are randomly chosen to take the prep course. Their SAT scores before and after completing the prep course are listed in the following table. Test the claim at the 0.01 level of significance. SAT Scores 1170 1200 | 1040 | 1280 || 1450 1470 | 1500 Before Prep Course | 1010 980 After Prep Course 1100 | 1260 1190 | 1280 | 1170 | 1370 1440 1500 1520 280 | 20 80 | 130 90 Difference 90 10 30 20
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