Please use the ABC Testing Prep data. (Read carefully) ABC Testing Prep provides tests preparation courses for the Certified Public Account (CPA) examination. It offers three different prep courses- One-week review, One-month program and Three-month course. The results of a recent CPA are provided in an Excel document (Section A). There are also the results of the last three CPA's (Section B). Use a 0.05 significant level and state the null and alternate hypotheses in each case.

a. Is there a difference between the means of the three courses for the time spent after graduation before taking the CPA ?

b. Test whether there is a difference in the population means for the time spent after graduation before taking the CPA ?

c. Does it matter which course you take depending on the time you take the CPA after graduation?

AutoSave FFA OO - ABC Testing Prep Insert Draw Page Layout Formulas Data Home - Review View Developer Tell me Share Comments Calibri (Body v 11 v AL 92 ah Wraa Text General SR V LTX V X [G HH FO WS Pastc B BIU - - Merge & Center $ % ) Insert - A Delete Format Conditional Format Cell Formatting as Table Styles Sort Filter Find & Select Analyze Data Yes No A M N P S U V w X Y Open recovered workbooks? Your recent changes were saved. Do you want to continue working where you left off? 19 x fx R n F F G H 1 . K 1 2 Section A Time Spent after graduation helore taking the CPA Exam 3 Courses 4 6 month 1 year 2 year 4-year 5 One-weck review 51 SD) SS 61 Ooo buni program 73 S8 68 75 7 Three month course 80 71 7.3 75 7 9 10 Time Spent after graduation before taking the CPA Exam Courses 1- 1-year 51 30 One week revien 2-y.ca SO SD) 3-year 55 S2 4-YCH 61 53 One-month program 62 75 6-mooth 60 61 59 73 76 7 80 82 79 58 61 58 GR 49 74 75 72 TR 78 74 83 80 65 73 71 Three-month course 71 75 7.3 77 11 12 Section 13 14 15 16 17 18 15 20 2 22 23 24 25 26 27 28 20 30 31 32 32 34 35 36 32 38 39 40 Sheel 1 + . Ready # + 100% AutoSave FFA OO - ABC Testing Prep Insert Draw Page Layout Formulas Data Home - Review View Developer Tell me Share Comments Calibri (Body v 11 v AL 92 ah Wraa Text General SR V LTX V X [G HH FO WS Pastc B BIU - - Merge & Center $ % ) Insert - A Delete Format Conditional Format Cell Formatting as Table Styles Sort Filter Find & Select Analyze Data Yes No A M N P S U V w X Y Open recovered workbooks? Your recent changes were saved. Do you want to continue working where you left off? 19 x fx R n F F G H 1 . K 1 2 Section A Time Spent after graduation helore taking the CPA Exam 3 Courses 4 6 month 1 year 2 year 4-year 5 One-weck review 51 SD) SS 61 Ooo buni program 73 S8 68 75 7 Three month course 80 71 7.3 75 7 9 10 Time Spent after graduation before taking the CPA Exam Courses 1- 1-year 51 30 One week revien 2-y.ca SO SD) 3-year 55 S2 4-YCH 61 53 One-month program 62 75 6-mooth 60 61 59 73 76 7 80 82 79 58 61 58 GR 49 74 75 72 TR 78 74 83 80 65 73 71 Three-month course 71 75 7.3 77 11 12 Section 13 14 15 16 17 18 15 20 2 22 23 24 25 26 27 28 20 30 31 32 32 34 35 36 32 38 39 40 Sheel 1 + . Ready # + 100%