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Do SAT coaching classes work? Do they help students to improve their test score...
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Do SAT coaching classes work? Do they help students to improve their test scores? Four students were selected randomly from all of the students that completed an SAT coaching class. For each student, we recorded their first SAT score (before the class) and their second SAT score (after the coaching class).
Student | 1 | 2 | 3 | 4 |
First SAT score | 920 | 830 | 960 | 910 |
Second SAT score | 1010 | 800 | 1000 | 980 |
To analyse this data, we should use
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