Exploring Box and Whisker Plots

This video tutorial covers the basics of box-and-whisker plots, including how to identify quartiles and calculate the interquartile range. It explains how to create a box-and-whisker plot using a number line and discusses the concept of outliers, providing a rule for determining them based on the interquartile range.

What is the second quartile also known as?

• Range

• Mode

• Median

• Mean

How many parts does a quartile divide the data into?

• Four

• Eight

• Six

• Two

What is the first quartile value in the example discussed?

• 2

• 21

• 11

• 5

What does the interquartile range represent?

• Average value of the data set

• Sum of all quartiles

• Difference between the first and third quartiles

• Difference between the maximum and minimum values

In a box-and-whisker plot, what do the 'whiskers' represent?

• Maximum and Minimum values

• First and Third Quartiles

• Median and Mode

• None of the above

What is the interquartile range if the first quartile is 5 and the third quartile is 21?

• 16

• 21

• 15

• 26

How is an outlier determined in relation to the interquartile range?

• Less than the first quartile minus 1.5 times the interquartile range

• Greater than the third quartile plus 1.5 times the interquartile range

• Neither A nor B

• Both A and B

If the interquartile range is 15, how far can a value be from the third quartile to still be considered within the acceptable range?

• 7.5 units

• 30 units

• 22.5 units

• 15 units

What would be considered an outlier if the third quartile is 21 and the acceptable range extends 22.5 units above it?

• 45

• 44

• 43.5

• 40

What value below the first quartile would be considered an outlier if the acceptable range is 22.5 units below it and the first quartile is 6?

• -16.5

• -17

• -18

• -15