Box and Whisker Plots
BOX AND WHISKER
 PLOT REVIEW
 QUESTIONS
Step 2: Determine the median value of the data:  
Step 1:  Put the data in order from least to greatest. 
Step 3:  Now  use the median to divide the data 
 into 2 groups
Step 4:   Median of the lower quartile

Given the following data on ages of children.

10,12,9,7,10,12,6 

Follow the steps below to create a box plot.

Group 1: 
,
     Median of the upper quartile
,
,
,
,
   Group 2:
,
 What is the lowest value of the data?
What is the highest value of the data?

Data on ages of children.

10,12,9,7,10,12,6

 


  

How do you find the range of a given set of data?

 subtract the lowest # from the highest #

sum of numbers ÷  number of data

put data in order, find middle value

which ever #(s) that occur the most

Use the box and whisker plot to answer the questions.

 

What is the median value of the data?
What is the median of the lower quartile?
What is the median of the  upper quartile?
20
30
38

What is the age of the youngest student?

 

What is the age of the oldest student?

 

What is the range of the data in this diagram?

8
10

Ages of Students

12
14
16
18
Reebok
What is the median value of Nike Sneakers?
What is the value of the median of the
 lower quartile for Nike Sneakers?
Which brand of sneakers has
 a price range of $10?
32    34       36       38     40      42      44      46      48      50      52
Average Prices of Sneakers
Nike

Reebok

 Nike
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