Question

The table displays the scores of students on a recent exam. Find the mean of the scores to the nearest 10th.

Score: 55, 60, 65, 70, 75, 80, 85, 90
Number of Students: 1, 5, 6, 1, 7, 7, 2, 9

Answer 1

To find the mean score, we need to first calculate the sum of all the scores multiplied by their corresponding number of students:

(55 x 1) + (60 x 5) + (65 x 6) + (70 x 1) + (75 x 7) + (80 x 7) + (85 x 2) + (90 x 9) = 3190

Then, we need to find the total number of students:

1 + 5 + 6 + 1 + 7 + 7 + 2 + 9 = 38

Finally, we can find the mean score by dividing the sum of scores by the number of students:

3190 / 38 = 84.21

Rounding this to the nearest 10th gives us a mean score of 84.2.