un 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 ne 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) throug F). 7 8 444 635 616 409 545 605 516 395 561 471 632 387 337 461 9 10 11 12 13 14 0 Student Score on first test Score on second test 450 698 674 448 489 630 496 543 636 558 643 407 374 493 1 2 3 4 (c) Calculate d and s.

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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
Score on second test 450 698 674 448 489 630 496 543 636 558 643 407 374 493
6 7
8
444 635 616 409 545 605 516 395 561 471 632 387 337 461
1
2
3
9 10 11 12 13 14 O
4
(e) Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below.
O Reject the null hypothesis.
Fail to reject the null hypothesis.
(f) Interpret the decision in the context of the original claim. Choose the correct answer below.
O A. The sample was not large enough to make a conclusion.
O B. At the 1% significance level, there is enough evidence that the students' critical reading scores improved the second time they took the test.
O C. At the 1% significance level, there is not enough evidence that the students' critical reading scores improved the second time they took the test.
O D. At the 1% significance level, there is evidence that the students' critical reading scores got worse the second time they took the test.
Click to select your answer(s).
225 PM
P Type here to search
12/17/2020
Transcribed Image 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 Score on second test 450 698 674 448 489 630 496 543 636 558 643 407 374 493 6 7 8 444 635 616 409 545 605 516 395 561 471 632 387 337 461 1 2 3 9 10 11 12 13 14 O 4 (e) Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below. O Reject the null hypothesis. Fail to reject the null hypothesis. (f) Interpret the decision in the context of the original claim. Choose the correct answer below. O A. The sample was not large enough to make a conclusion. O B. At the 1% significance level, there is enough evidence that the students' critical reading scores improved the second time they took the test. O C. At the 1% significance level, there is not enough evidence that the students' critical reading scores improved the second time they took the test. O D. At the 1% significance level, there is evidence that the students' critical reading scores got worse the second time they took the test. Click to select your answer(s). 225 PM P Type here to search 12/17/2020
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).
8 9
444 635 616 409 545 605 516 395 561 471 632 387 337 461
10 11 12 13 14 D
Student
Score on first test
Score on second test 450 698 674 448 489
1
2
4
6
7
643 407 374 493
(c) Calculate d and sa
d=
(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.)
(d) Use the t-test to find the standardized test statistic t.
?
Click to select your answer(s).
225 PM
12/17/2020
Transcribed Image 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). 8 9 444 635 616 409 545 605 516 395 561 471 632 387 337 461 10 11 12 13 14 D Student Score on first test Score on second test 450 698 674 448 489 1 2 4 6 7 643 407 374 493 (c) Calculate d and sa d= (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.) (d) Use the t-test to find the standardized test statistic t. ? Click to select your answer(s). 225 PM 12/17/2020
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