The scores for a statistics test are as follows: $$\begin{array} { l l l l l l l l l l }
95 & 76 & 68 & 77 & 73 & 92 & 81 & 85 & 77 & 89 \
79 & 87 & 50 & 60 & 85 & 72 & 85 & 62 & 18 & 74
\end{array}$$ Compute the mean score.
A) 74.25
B) 77.45
C) 65.20
D) 75

Question

The scores for a statistics test are as follows: $$\begin{array} { l l l l l l l l l l } 
95 & 76 & 68 & 77 & 73 & 92 & 81 & 85 & 77 & 89 \
79 & 87 & 50 & 60 & 85 & 72 & 85 & 62 & 18 & 74
\end{array}$$ Compute the mean score.
A) 74.25
B) 77.45
C) 65.20
D) 75

Quizplus · Accepted Answer

The mean score is the sum of all the scores divided by the number of scores. In this case, the mean score is (95 + 76 + 68 + 77 + 73 + 92 + 81 + 85 + 77 + 89 + 79 + 87 + 50 + 60 + 85 + 72 + 85 + 62 + 18 + 74) / 20 = 1485 / 20 = 74.25.