Understanding Quartiles and Box Plots

This video tutorial explains how to represent data using a box plot, also known as a box and whisker plot. It covers the steps to order data, find the minimum and maximum values, calculate the median, and divide data into quartiles. The tutorial demonstrates how to plot these elements on a number line to create a box plot, highlighting the usefulness of this method in representing large data sets.

What is another name for a box plot?

• Histogram

• Box and Whisker Plot

• Line Graph

• Pie Chart

What is the first step in creating a box plot?

• Calculate the mean

• Draw the number line

• Organize data from least to greatest

• Find the mode

How do you find the median in a data set with an even number of values?

• Choose the middle number

• Average the two middle numbers

• Select the lowest number

• Select the highest number

What is the median of the data set: 14, 15, 15, 16, 19, 19, 20, 21, 22?

• 19

• 15.5

• 15

• 16

What is the term for the value that separates the lower 25% of data from the rest?

• Median

• First Quartile

• Maximum

• Third Quartile

What is the first quartile of the data set: 12, 14, 15, 15, 16, 19?

• 19

• 12

• 13.5

• 15

What is the third quartile of the data set: 19, 20, 21, 22?

• 21

• 20

• 19

• 19.5

What does the box in a box and whisker plot represent?

• The minimum and maximum values

• The mean of the data set

• The entire data set

• The interquartile range

What do the 'whiskers' in a box and whisker plot represent?

• The median

• The quartiles

• The mean

• The minimum and maximum values

What percentage of data lies below the third quartile?

• 25%

• 50%

• 75%

• 100%