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 after taking the review course. Complete parts (a) through (d) below. Click the icon to view the data table. a. Perform a hypothesis test using a = 0.05 to determine if the average test score is higher for the students after the review course when compared with before the course. Let u 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. O A. Ho: Hd > 0 OB. Ho: Hd 20 - X H1 : Hd SO H1 : Hd 0 20 25 21 18 b. Calculate the appropriate test statistic and interpret the results of the hypothesis test using a = 0.05. 33 36 16 19 DO YOU A WN The test statistic is |. (Round to two decimal places as needed.) 34 29 27 22 32 The critical value(s) is(are) 23 31 30 (Use a comma to separate answers as needed. Round to two decimal places as needed.) Interpret the results of the hypothesis test. Since the test statistic the critical value(s), the null hypothesis. There is evidence that the mean sc Print Done c. Identify the p-value and interpret the result. p-value = (Round to three decimal places as needed.) Interpret the result