TV3 Measures of dispersion jko

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 3

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In this lesson we learn how to find the Quartiles in a data set with an odd and an even amount of numbers.

• 4+2+3+7+8+5+1= 30
  
• First half 1-15 
• Second half 16-30
• What are the 15th and 16th numbers?
• 4+2+3+6 = 15
• 4+2+3+7= 16

• -> 8
  
• -> 8
  

• 4+2+3+7+8+5+1= 30
  
• First half 1-15 
• Second half 16-30
• What are the 15th and 16th numbers?
• 4+2+3+6 = 15 -> 8
• 4+2+3+7= 16 -> 8

Median =

 

​2​​15​th​​+16​th​​​​

​2​​8+8​​=​2​​16​​=8

Calculate the first and the third quartile....

Calculate the first and the third quartile

1. 5 and 8
2. 5 and 9
3. 4 and 9
4. 4 and 8

For how many minutes did Fred record his data?

How many cars passed by while Fred was recording?

1. 81
2. 83
3. 82
4. You can't know that

Who was observing the busiest road? Explain your answer!

Please explain in your own words: 

• Median 
  
• first quartile 
  
• third quartile.
  

There are exercises in Assigments in teams you need to do right now. You can hand it in until 15:00 pm.

Good luck!

This was the aim of our lesson:

In this lesson we learn how to find the Quartiles in a data set with an odd and an even amount of numbers.