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 greater than 15 points? Let μ₁ represent the mean score after the class and μμ₁₂. Use the a=0.10 level and the P-value method with the TI-84 Plus calculator. Before After 383 334 378 467 420 368 396 488 Send data to Excel Part 1 of 4 Score H₁: >15 This is a right-tailed ▼ test. 470 473 443 459 426 493 489 473 448 473 428 525 (a) State the appropriate null and alternate hypotheses. Ho: u = 15

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