Question

The test scores for a group of students are shown. 89, 74, 100, 86, 74, 67, 86, 72, 60, 93, 83, 86 What is the approximate mean of the scores?

Answer 1

80.83

Mean is the average of all the numbers. So to work it out you add all the numbers up ( 89+74+100+86+74+67+86+72+60+93+83+86 = 970 ) then you divide the 970 by the amount of numbers there is ( 12 ) so 970 divided by 12 is 80.83.

Answer 2

(89+ 74+ 100+86+74+67+ 86+ 72+ 60+ 93+ 83+ 86)/12≈80.83≈81