In a recent STA 2023 class a random sample of 12 students we…

In a recent STA 2023 class a random sample of 12 students were selected and their Exam 2 and Exam 3 scores recorded.  The data is in the table below. Student 1 2 3 4 5 6 7 8 9 10 11 12 Exam 2 91 43 82 73 67 88 67 88 70 82 91 73 Exam 3 82 64 82 87 70 79 79 91 82 94 88 79 Difference 9 -21 0 -14 -3 9 -12 -3 -12 -12 3 -6 Difference is calculated as Exam 2 – Exam 3. Dotplots of the data are given below.   Some summary statistics are