Unit 10 - Box Plots

You must know:
The 5 number summary of the plot. Start in the middle and work your way out.

The Range and The Interquartile Range.

What kind of data is best displayed in a box plot? Large sets of numbers.

What questions to ask and who do you ask to get unbiased data.

The percentages associated with box plots.

Compare 2 box plots and make observations.

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Box Plots

Multiple Choice

Remember, each section of a box plot is 1/4 of the data. If you know how many pieces of data are represented in the whole plot, then you can find how many pieces of data are in each forth.

• 30

• 40

• 50

• 60

Multiple Choice

If there are 20 kids in your class, how many of them scored an 85 or higher?

• 5

• 10

• 18

• 15

Multiple Choice

What percent of students were between 58 and 60 inches tall?

• 20%

• 25%

• 50%

• 75%

Multiple Choice

If there are 18 kids in your friend's class, how many scored an 80 or higher?

• 9

• 10

• 8

• 14

Multiple Choice

If there are 18 students in your friend's class, how many scored 70 or less?

• 6

• 7

• 5

• 2

Multiple Choice

If there are 20 students in your class, how many scored 95 or higher?

• 5

• 7

• 8

• 12

Multiple Choice

What percent of the data is between 90 and 140?

• 75%

• 25%

• 30%

• 50%

Multiple Choice

Which statement is not true about the data?

• The median test score is 80.

• The upper quartile is 90.

• The IQR is 30.

• The lower quartile is 65.

Multiple Choice

What is the interquartile range?

• 60

• 4

• 8

• 2