The plot contains the minimum, first quartile, median, third quartile and maximum values.
From the set of values,
minimum = lowest value = 2
maximum = highest value = 16
Median number is the middle number. Snce the two numbers in the middle are 8, the median is the average. Thus,
Median number = (8 + 8)/2 = 16/8 = 2
First quartile = (n + 1)/4 = (14 + 1)/4 = 3.75
It is the 3.75th term. It is also the median of the lower halve of the data set
First quartile, Q1 =
Third quartile = 3(n + 1)/4 = 3(14 + 1)/4 = 11.25
It is the 11.25th term. It is also the median of the upper halve of the data set
Third quartile, Q1 = 11
The box and whiskers plot is shown below