Given:
The given box plot represents the class size of Oceanside middle school.
To find:
The upper quartile of the class side.
Solution:
In a box plot the starting the end or box present the first quartile and third quartile respectively. The line inside the box represents the median. The left and right end points of the segments are the minimum and maximum values respectively.
From the given box-plot it is clear that,
Minimum value = 22
First quartile or lower quartile= 24
Second quartile or median = 25
Third quartile or upper quartile= 26
Maximum value = 29
Therefore, the upper quartile of the class size is 26 student.
