Understanding Box and Whisker Plots

What does the range in a box plot represent?

• The middle 50% of the data

• The spread of the entire data set

• The difference between the first and third quartiles

• The average value of the data

What is the purpose of a box and whisker plot?

• To calculate the sum of all data points

• To show the distribution and spread of a data set

• To represent the maximum value only

• To display the average values of a data set

How do you calculate the range from a box plot?

• Find the average of all data points

• Subtract the third quartile from the first quartile

• Subtract the maximum value from the minimum value

• Add the first and third quartiles and divide by two

What is the range if the maximum value is 18 and the minimum value is 4?

• 14

• 22

• 4

• 18

What does the interquartile range (IQR) measure in a box plot?

• The average value of the data

• The spread of the middle 50% of the data

• The spread of the entire data set

• The difference between the maximum and minimum values

How is the interquartile range calculated?

• Find the average of all data points

• Subtract the maximum value from the minimum value

• Add the first and third quartiles and divide by two

• Subtract the first quartile from the third quartile

If the first quartile is 9 and the third quartile is 16, what is the IQR?

• 7

• 25

• 9

• 16

What percentage of data is represented by the interquartile range in a box plot?

• 75%

• 25%

• 100%

• 50%

Which part of the box plot represents the interquartile range?

• The median line

• The box

• The space outside the box and whiskers

• The whiskers

What does the box in a box plot represent?

• The middle 50% of the data

• The first and third quartiles

• The range of the data

• The maximum and minimum values