Finding Interquartile Range from Dot Plot 1

Kim199 27,542 views 92 slides Dec 15, 2014
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About This Presentation

Calculating interquartile range from dot plot with Odd number of scores with step by step illustration

Size: 334.85 KB
Language: en
Added: Dec 15, 2014
Slides: 92 pages

Slide Content

Finding: Interquartile Range from Dot Plot 1 - Mr Kim

Example on: Finding IQR for odd number of scores

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Here is a Dot Plot

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) First, find the Median by crossing off the dots

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Start by crossing off the Bottom dot from the Smallest Score

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Start by crossing off the Bottom dot from the Smallest Score

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Now cross off the Top dot from the Biggest Score

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Now cross off the Top dot from the Biggest Score

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Cross off the dots in the directions shown

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Stop here

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Always stop at “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) So the Median (Q 2 ) is 3

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Now divide the Dot Plot in two

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) **It is very important to divide the sides properly

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) To do this, count the dots from the start until you reach the Median

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Stop here!

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Now put a Border around the dots that you just counted

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Now put a Border around the other side

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) This is how you correctly divide the sides

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Notice there are 9 dots on each side

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) 9 in here

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) And 9 in here 9 in here

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) This is the INCORRECT

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) There are 7 dots in here There are 11 dots in here This is the INCORRECT

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores)

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Now find the Median for both sides of the dots

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Start with this side

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Remember the directions

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Stop here

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) So the Lower Quartile (Q 1 ) is …

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) So the Lower Quartile (Q 1 ) is 1

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Because the dot is on top of the score 1

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 Now do the same to the other side

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 Remember the directions

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 “In”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 “Out”

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 Stop here

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 So the Upper Quartile (Q 3 ) is …

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 So the Upper Quartile (Q 3 ) is 4

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 Because the dot is on top of the score 4

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 Upper Quartile: 4

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 So the Interquartile Range is: Upper Quartile: 4

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 So the Interquartile Range is: Upper Quartile: 4

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 So the Interquartile Range is: 4 – Upper Quartile: 4

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 So the Interquartile Range is: 4 – Upper Quartile: 4

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 So the Interquartile Range is: 4 – 1 Upper Quartile: 4

1 2 3 4 5 Finding IQR from Dot Plots (Odd number of scores) Lower Quartile: 1 So the Interquartile Range is: 4 – 1 = 3 Our Final Answer! Upper Quartile: 4
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