Question

For the take-home portion of the exam, you will be analyzing the dataset titled "Testscores", found on the Content page. This dataset lists the scores for two different classes who were both given a similar test. Using this data, answer the following 5 questions, each worth 10 points 1. Calculate a 95% confidence interval for the mean score in each class, What conclusions can we draw from this? 2. Calculate a 95% confidence interval for the difference between the two class means. Does this give us the same conclusion as the separate intervals in part 1? 3. Perform a hypothesis test at a.05 to determine if there is a significant difference between the two classes' mean scores 4. Perform a Wilcoxon Rank-Sum test at α .05 to determine if there is a significant difference between the two classes median scores. (Remember to account for ties in the ranking, but do not worry about applying the variance correction.) 5. Make a Normal quantile plot for each class. Do both samples appear to follow a Normal distribution? Based on this, which of the two statistical tests seems more appropriate? 12:40 el X New content added: Testscores Class I Class 1 Class 4 Class Class 2Cass es class 2 Cass Home Insert Page Layout Formulas Data File Calibri 11A A Paste Font Score Score Class 58 Class 1 72 Class1 85 Class 1 80 Class 1 74 Class 1 59 Class 1 98 Class 1 66 Class 1 77 Class 1 53 Class 1 41 Class 1 60 Class 1 65 Class 1 93 Class 1 79 Class 1 86 Class 1 60 Class 1 74 Class 1 50 Class 1 7 12 13 14 16 17 18 19 20 Sheet1! Home Insert Page Layout Formulas Data Review File % Calibri Paste Font Alignme A1 5 0 50 Class 1 53 Class 1 54 Class 1 69 Class 1 62 Class 1 97 Class 1 24 26 87 Class 1 + 27 76 Class 1 84 Class 1 65 Class 1 68 Class 1 53 Class 1 41 Class 1 99 Class 1 59 Class 1 50 Class 1 99 Class 1 78 Class 1 70 Class 1 74 Class 2 Sheet1 30 31 32 34 35 36 37 38 7 O Type here to search File Home Insert Page Layout Formulas Data Calibri 11 A A Paste Clipboard Font A1 74 Class 2 70 Class 2 74 Class 2 89 Class 2 91 Class 2 85 Class 2 39 40 42 43 45 82 Class 2 + 46 47 48 49 50 51 52 53 54 74 Class 2 49 Class 2 91 Class 2 54 Class 2 54 Class 2 87 Class 2 78 Class2 93 Class 2 68 Class 2 96 Class 2 57 Class 2 72 Class 2 90 Class2 Sheet 1 56 57 58 Ready File Home Page Layout Formulas D Calibri Paste Font Clipboard r 90 Class2 89 Class 2 95 Class 2 77 Class 2 78 Class 2 59 Class 2 96 Class 2 . 77 Class 2 73 Class 2 89 Class 2 98 Class2 54 Class 2 86 Class2 94 Class 2 89 Class 2 55 Class2 96 Class 2 78 Class 2 84 Class 2 92 Class 2 58 59 60 61 62 63 65 67 68 69 70 71 72 73 74 75 76 Sheet1 ④ Ready Flle Calibri 11 A' Paste Clipboard Font A1 67 68 69 70 71 72 73 74 75 76 89 Class 2 98 Class 2 54 Class 2 86 Class 2 94 Class2 89 Class2 55 Class 2 96 Class2 78 Class 2 84 Class 2 92 Class 2 95 Class 2 74 Class 2 78 79 80 81 82 83 85

Answer 1

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thens ex 스스 test statisie .99 从.