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 conclude that the mean increase in scores differs from 15 points? Let represent the mean score after the class and d =. Use the = 0.10 level a the P-value method with the TI-84 Plus calculator. Score Before 513 After 525 483 447 440 482 482 479 439 435 451 453 491 526 451 431 454 463 511 529 Send data to Excel Part: 0 / 4 Part 1 of 4 (a) State the appropriate null and alternate hypotheses. Ho H: