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Grade 8 Maths Unit Test 2
Contributed by: Boyle
(Original author: Lester)
Determine the median value of the data:  
What is the IQR of the data set?
Choose the best word to
 describe this data set: 
What is the range of the data set?

Construct a box and whisker plot:Given the following data on ages 

of children.

                             10,12,9,11,6,12,9

Step 1:  Put the data in order from least to greatest. 
,
,
,
,
,
No mode
Bimodal
Trimodal
Unimodal
,

Warm Up  Exercises.

 

 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

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

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?
20
What is the median of the  upper quartile?
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

Ages of Students

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

Reebok

 Nike
How many times did Jenna spend less than 30 minutes practicing?
What is the total amount of practice sessions Jenna has had?
How many times has Jenna practiced more than one hour?
Which class interval had the highest frequency?
Which class interval had the lowest frequency?
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