Question

The boxplots below show the test scores for 2 different classes. First period has 20 students and 2nd period has 16 students. How many more students scored 80 or higher in class 2 than in class 1?

Answer 1

A box plot has 5 data descriptions. The number of students who scored 80 or higher in class 2 than in class 1 is 2.

How does a boxplot show the data points?

A box plot has 5 data descriptions:

• The leftmost whisker shows the minimum value in the data.
• The rightmost whisker shows the maximum value in the data.
• The leftmost line in the box shows the first quartile.
• The middle line shows the median, also called the second quartile.
• The last line of the box shows the third quartile.

The number of students in the first class who scored more than 80 is 10, while the number of students in the second class who scored more than 80 is 12.

Therefore, the number of students who scored 80 or higher in class 2 than in class 1 is 2(12-10).

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