The stem-and-leaf display shows the results of a math test written by 30 students. $1009118011111235566897556889637785484342710\begin{array} { r | l } 10 & 0 \\9 & 11 \\8 & 01111123556689 \\7 & 556889 \\6 & 3778 \\5 & 48 \\4 & \\3 & 4 \\2 & 7 \\1 & \\0 &\end{array}$

A) 79
B) 81.5
C) 87
D) 80.5
E) 88.5

Question

The stem-and-leaf display shows the results of a math test written by 30 students.

1009118011111235566897556889637785484342710\begin{array} { r | l } 10 & 0 \\9 & 11 \\8 & 01111123556689 \\7 & 556889 \\6 & 3778 \\5 & 48 \\4 & \\3 & 4 \\2 & 7 \\1 & \\0 &\end{array}

A) 79
B) 81.5
C) 87
D) 80.5
E) 88.5

Jacob Anderson · Accepted Answer

Final Answer : D, Explanation :  The median is the middle value of the ordered data set. With 30 students, the median will be the average of the 15th and 16th scores. The 15th score is 78 and the 16th score is 83, so the median is (78 + 83) / 2 = 80.5.

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