A standardized test has a scale that ranges from 3 to 45. A new type of review course for the test was developed by a training company. The accompanying table shows the scores for nine students before and aftei taking the review course. Complete parts (a) through (d) below. E Click the icon to view the data table. a. Perform a hypothesis test using a: 0.01 to determine if the average test score is higher for the students after the review course when compared with before the course. Let Pd be the population mean of matched-pair differences for the score before the course minus the score after the course. State the null and alternative hypotheses. Choose the correct answer below. OA. Hozpd¢o OB. Hozpdzfl H13l1d =0 H1: Pd <0 0 Test Scores Oc. Hozud>0 OD. Ho:pd<0 H1:p.dSO H1:pd20 O E’ H0: l‘d =0 0 F’ H0416 so Student Before After H1:pd¢0 H1:pd>0 27 28 21 26 22 15 30 33 1 8 1 9 35 32 24 23 25 34 31 29 1). Calculate the appropriate test statistic and interpret the results of the hypothesis test using a = 0.01. The test statistic is . (Round to two decimal places as needed.) The critical value(s) is(are) :|. (Use a comma to separate answers as needed. Round to two decimal places as needed.) wmummewM—x Interpret the results of the hypothesis test. Print ‘i Done ‘ Click to select your answer(s).
A standardized test has a scale that ranges from 3 to 45. A new type of review course for the test was developed by a training company. The accompanying table shows the scores for nine students before and aftei
taking the review course. Complete parts (a) through (d) below. E Click the icon to view the data table. a. Perform a hypothesis test using a: 0.01 to determine if the average test score is higher for the students after the review course when compared with before the course. Let Pd be the population mean of
matched-pair differences for the score before the course minus the score after the course. State the null and alternative hypotheses. Choose the correct answer below. OA. Hozpd¢o OB. Hozpdzfl
H13l1d =0 H1: Pd <0 0 Test Scores Oc. Hozud>0 OD. Ho:pd<0
H1:p.dSO H1:pd20 O E’ H0: l‘d =0 0 F’ H0416 so Student Before After
H1:pd¢0 H1:pd>0 27 28 21 26
22 15
30 33
1 8 1 9
35 32
24 23
25 34
31 29 1). Calculate the appropriate test statistic and interpret the results of the hypothesis test using a = 0.01. The test statistic is . (Round to two decimal places as needed.) The critical value(s) is(are) :|.
(Use a comma to separate answers as needed. Round to two decimal places as needed.) wmummewM—x Interpret the results of the hypothesis test. Print ‘i Done ‘ Click to select your answer(s).
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