Answer:To find the mode, we need to identify the number that appears most frequently in the data set. The data set is: 90.7, 89.5, 93.4, 92.1, 82.6, 92.2, 94.4, 89.5, 86.7, 90.4, 94.4, 97.1, 89.5 Let's count the occurrences of each number: - 82.6: 1- 86.7: 1- 89.5: 3- 90.4: 1- 90.7: 1- 92.1: 1- 92.2: 1- 93.4: 1- 94.4: 2- 97.1: 1 The number 89.5 appears three times, which is more frequent than any other number in the data set. Therefore, the mode is 89.5