In this media, we will learn about box-whisker graph.
A box whisker graph is used to show details about the data by using quartile values.
Victor worked in a company for 20 weeks.
The following are the number of hours, victor worked each week.
Let's find the quartile values.
Rearrange the sequence in ascending order to find the median.
Median is the second quartile value and it divides the sequence into two equal halves.
Find the median for the sequence in the left of the second quartile.
Thus we have found the first quartile value.
Similarly find the third quartile value by finding the median for the sequence in the right of the second quartile.
Let's draw the box-whisker graph by using these quartile values.
Draw a line and scale it from 0 to 30.
Keep dots above the numbers 0, 7.5, 9.5, 14 and 27.
Draw a box connecting the dots that denotes the first and third quartile values.
Inside the box, a vertical line is drawn through the dot that denotes the second quartile value.
Join the dots representing the minimum value and the first quartile value.
Similarly join the dots representing the third quartile value and the maximum value.
The shortest line segment at the left explains that the data is more dense at the first half of the data.
The box denotes the range of the middle values of the collected data.
And now you learned about box-whisker graph.
Log in to save your progress and obtain a certificate in Alison’s free Statistics: Effectively Displaying Data online course
Sign up to save your progress and obtain a certificate in Alison’s free Statistics: Effectively Displaying Data online course
Please enter you email address and we will mail you a link to reset your password.