Finding the Interquartile Range from a Box Plot (Box and Whisker Plot) | Math with Mr. J

What is the formula used to calculate the Interquartile Range (IQR)?

• Q3 + Q1

• Q3 - Q1

• Max - Min

• Median - Q1

Based on the box plot shown, what is the value of the first quartile (Q1)?

• 78

• 84

• 88

• 90

What does the Interquartile Range (IQR) represent in a data set?

• The spread of the entire data set.

• The average of the data set.

• The spread of the middle 50% of the data.

• The lowest value in the data set.

Using the box plot provided, what is the Interquartile Range (IQR)?

• 6

• 12

• 16

• 90