An instructor for a test preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 14 students the first two times they took...

Extracted text: An instructor for a test preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 14 students the first two times they took the test. Before taking the test for the second time, the students took the instructor's course to try to improve their critical reading test scores. At a = 0.01, is there enough evidence to support the instructor's claim? Complete parts (a) through (f). Student Score on first test 1 3 4 9 10 11 12 13 14 D 436 396 447 520 526 517 596623 575 403 591 622 527 338 Score on second test 437 405 457 545 474 530 536 626 590 407 622 658 551379 5 6 7 8 Identify the rejection region(s). Choose the correct answer below. OA. t< -="" 2.650="" o="" b.="" t="">3.012 O C. t< -3.012="" or="" t=""> 3.012 O D. t< -="" 2.650="" or="" t=""> 2.650 (c) Calculate d and sa. d = -7.143 (Type an integer or a decimal. Round to three decimal places as needed.) Calculate sa. (Type an integer or a decimal. Round to three decimal places as needed.)