Estimate the mean exam score for the 50 students in Prof. Axolotl's class. $$\begin{array} { c r }
\text { Score } & f \
40 \text { but less than } 50 & 6 \
50 \text { but less than } 60 & 18 \
60 \text { but less than } 70 & 14 \
70 \text { but less than } 80 & 9 \
80 \text { but less than } 90 & 3 \
\text { Total } & 50
\end{array}$$
A)59.2
B)62.0
C)63.5
D)64.1

Question

Estimate the mean exam score for the 50 students in Prof. Axolotl's class. $$\begin{array} { c r } 
\text { Score } & f \
40 \text { but less than } 50 & 6 \
50 \text { but less than } 60 & 18 \
60 \text { but less than } 70 & 14 \
70 \text { but less than } 80 & 9 \
80 \text { but less than } 90 & 3 \
\text { Total } & 50
\end{array}$$
A)59.2
B)62.0
C)63.5
D)64.1

Quizplus · Accepted Answer

To estimate the mean, calculate the midpoint for each score range, multiply by the frequency, sum these products, and divide by the total number of students. The calculation is: (45*6 + 55*18 + 65*14 + 75*9 + 85*3) / 50 = 62.0.

Estimate the Mean Exam Score for the 50 Students in Prof