Online testing: Do you prefer taking tests on paper or online? A college instructor gave identical tests to two randomly sampled groups of 31 students. One group took the test on paper and the other took it online. Following are the test scores. Paper 57 59 59 59 62 63 56 51 74 53 54 87 58 57 72 67 84 85 65 51 56 58 72 53 56 90 84 69 70 67 57 Online 78 74 79 81 52 62 42 68 58 71 66 64 63 62 70 56 68 64 52 47 61 82 79 76 63 78 75 75 63 69 83 Send data to Excel Part: 0 / 2 Part 1 of 2 (a) Construct a 95% confidence interval for the difference in mean scores between paper and online tests. Let u denote the mean score for the paper tests. Use the TI-84 calculator and round the answers to one decimal place. A 95% confidence interval for the difference in mean scores between paper and online tests is