To find the mean, we need to first multiply each score by its corresponding number of students and then add up all of these products. Then, we divide this sum by the total number of students, which is the sum of all the numbers in the "Number of Students" column:
(65 x 2) + (70 x 7) + (75 x 2) + (80 x 6) + (85 x 7) + (90 x 9) + (95 x 2) + (100 x 1) = 10640
2 + 7 + 2 + 6 + 7 + 9 + 2 + 1 = 36
Mean = 10640 รท 36 = 295.56 (rounded to the nearest tenth)
Therefore, the mean of the scores is 295.6.
The table displays the scores of students on a recent exam. Find the mean of the scores to the nearest 10th.
Score: 65, 70, 75, 80, 85, 90, 95, 100
Number of Students: 2, 7, 2, 6, 7, 9, 2, 1
1 answer
1 answer