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Box and Whisker Plots
供稿人: Terman
(原作者: Moore)

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

which ever #(s) that occur the most

sum of numbers ÷  number of data

put data in order, find middle value

 subtract the lowest # from the highest #

The lower quartile of a given set of data is the?

the smallest number

the median of the upper ½ of data

the median of the lower ½ of data 

 subtract the lowest # from the highest #

the median of the upper ½ of data 

the median of the lower ½ of data

 subtract the lowest # from the highest #

subtract the lower quartile # 

     from the upper quartile #

How do you find the interquartile range

of a given set of data?

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

What is the value of the  upper (3rd) quartile?
What is the value of the lower (1st) quartile?

Use the box and whisker plot to answer the questions.

 

What is the median value of the data?
20
25
30
35

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

Ages of Students

10
12
14
16
18
What is the median price of Nike Sneakers?
Which brand of sneakers has a  price range of $10?
What is the value of the lower quartile for Reebok Sneakers?
32    34      36    38     40     42     44    46     48     50      52
Average Prices of Sneakers  (2002)
Reebok
Nike

Reebok

 Nike

Step 5:  Find the minimum value

Step 2: Determine the median value of the data:  
Group 1: 
Step 4:   Median of the lower quartile

Given the following data .

10,  15,  9,  7,  10,  12,  6

Construct a box and whisker plot.

Step 3:  Now  use the median to divide the data into 2 groups
Step 1:  Put the data in order from least to greatest. 
   Group 2:
     Median of the upper quartile
Find the maximum value

Step 5:  Find the minimum value

Step 2: Determine the median value of the data:  
Group 1: 
Step 4:   Median of the lower quartile

Given the following data on ages of children.

20,  12,  29,  17,  10,  14,  19,  24

Construct a box and whisker plot.

Step 3:  Now  use the median to divide the data into 2 groups
Step 1:  Put the data in order from least to greatest. 
   Group 2:
     Median of the upper quartile
Find the maximum value

Step 5:  Find the minimum value

Step 2: Determine the median value of the data:  
Group 1: 
Step 4:   Median of the lower quartile

Given the following data on ages of children.

30,  20,  32,  24,  26

Construct a box and whisker plot.

Step 3:  Now  use the median to divide the data into 2 groups
Step 1:  Put the data in order from least to greatest. 
   Group 2:
     Median of the upper quartile
Find the maximum value

Step 5:  Find the minimum value

Step 2: Determine the median value of the data:  
Group 1: 
Step 4:   Median of the lower quartile

Given the following data 

10,  18,  8,   14,  12,  6

Construct a box and whisker plot.

Step 3:  Now  use the median to divide the data into 2 groups
Step 1:  Put the data in order from least to greatest. 
   Group 2:
     Median of the upper quartile
Find the maximum value
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