SAT coaching: A sample of 10 students took a class designed to improve their SAT math scores. Following are their scores before and after the class. Can you conclude that the mean increase in scores is less than 15 points? Let μ, represent the mean score after the class and μμ₁-H₂. Use the a= 0.01 level and the P-value method with the TI-84 Plus calculator. Before After 440 439 435 479 451 451 431 454 Score 453 491 526 463 473 440 481 511 529 493 466 482

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