Question

The following stem-and-leaf plot represents the scores earned by Mr. Roberts's class on their most recent science test.

What is the median of the scores?
78
80
81
86

Answer 1

81

Explanation:

Answer 2

The median of {78, 80, 81, 86} is the average of the middle two scores, 80.5.

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For the picture, ...

There are 7 scores above the row with stem=8, and 7 scores below that row. Thus the middle score will be the middle score of the row with stem 8.

The median of the scores in the figure is 81.