Question

In a psychology class, 44 students have a mean score of 96.6 on a test. Then 13 more students take the test and their mean score is 66.3.

What is the mean score of all of these students together? Round to one decimal place.

mean of the scores of all the students

Answer 1

Answer: 89.7

Explanation:

The mean of a data set is the average of all the information given. Therefore, the total combined score is the number of students multiplied by the mean

The total score of the first 44 students: 96.6*44 = 4250.4

The total score of the later 13 students: 66.3*13 = 861.9

(4250.4 + 861.9)/(44 + 13) = 89.7

Hope this helped