unit 1 chapter 7 section 5 day one: box and whisker plots pg. 394
TRANSCRIPT
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Unit 1Chapter 7Section 5
Day One:Box and Whisker Plots
pg. 394
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Box-and-Whisker Plots
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Box and Whisker Plots
GPS . M7D1 Students will pose questions, collect data, represent and analyze the data, and interpret results.Analyze data with respect to measures of variation (range, quartiles, interquartile range)
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EQ:How is understanding the
measures of central tendency important in constructing a box and whisker plot?
How do we construct a Box and Whisker Plot?
How does a Box and Whisker Plot show variation?
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Five Key Points Students will trace their hand on a sheet of
printer paper. Label each finger, in order, as one of the
five key values. Lower Extreme (First) Lower Quartile Median (Third) Upper Quartile Upper Extreme
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Five Key Points Using the following data, find the Five Key
Points Then, Label them on your hand drawing Use colored pencils or crayons to color
code your drawing and your math.
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Step 1 – Order Numbers
1. Order the set of numbers from least to greatest
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2. Find the median. The median is the middle number. If the data has two middle numbers, find the mean of the two numbers. What is the median?
Step 2 – Find the Median
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3. Find the lower and upper medians or quartiles. These are the middle numbers on each side of the median. What are they?
Step 3 – Upper & Lower Quartiles
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4. Find the least number is the lower extreme. The greatest number is the upper extreme.
Step 4 – Upper & Lower Extremes
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Lower extreme-
Smallest #
First quartile is the median of the lower half of the data set
Second quartile- the median of the data set
Third quartile is the median of the upper half of the data set
Upper extreme- the biggest #
HERE IS AN EXAMPLE OF 5 KEY POINTS ON A BOX AND WHISKER PLOT
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Box and Whisker Plots
Lower quartile Upper quqrtileInterquartile range
Median Median
Median
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Box And Whisker Plot Brochure
On the front of your brochure, take two minutes and draw a picture or cartoon that represents MEDIAN.
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Box And Whisker Plot Brochure
Next, copy the following definitions into your brochure.
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Definitions: Box and whisker: shows the distribution
of a set of data along a number line by dividing the data into four parts
Median: (middle quartile) the middle number in a set of data ordered least to greatest
Lower Extreme: smallest number in a data set.
Upper Extreme: largest number in a data set
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Lower Quartile: median of the lower half Upper Quartile: median of the upper half
Range: the difference between the highest and lowest numbers
Interquartile Range: the difference between the upper and lower quartiles.
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Box and Whisker Plot Brochure:Now, Let’s make a Box and Whisker Plot Step One:
Order Data least to greatest
Heights in inches of all the cousins at a family reunion:68 71 85 50 71 56 53 71 70 60 71 65 57
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Box and Whisker Plot Brochure:Now, Let’s make a Box and Whisker Plot
Step Two:Circle the MedianStep Three:Circle the Lower Quartile and the Upper QuartileStep Four:Circle the Lower Extreme and the Upper Extreme
Heights in inches of all the cousins at a family reunion:68 71 85 50 71 56 53 71 70 60 71 65 57
THE FIVE CIRCLED NUMBERS ARE YOUR FIVE KEY VALUES. HIGH FIVE!
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Box and Whisker Plot Brochure:Now, Let’s make a Box and Whisker Plot
Step Five:Look at the number line, and put dots at the five key values.Step Six:Put vertical lines through the three middle valuesStep Seven:Use Lines to create your box and whisker plot!
Heights in inches of all the cousins at a family reunion:68 71 85 50 71 56 53 71 70 60 71 65 57
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Box and Whisker Plot Brochure:Five Key Values
Look at the BOOKS READ Box and Whisker Plot.
Can you label the five key values?
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Box and Whisker Plot Brochure:YOUR TURN!
Using the data on the back of your brochure and the number line given, create a box and whisker plot for the Test Scores.
TEST SCORES:90 70 75 85 65 60 75 80 85 85 65 75 85 85
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Closing What are the five key values? And, why
are they important?
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Unit 1Chapter 7Section 5
Day Two:Box and Whisker Plots
pg. 394
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EQ:How is understanding the measure of central tendency important in constructing a box and whisker plot?
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Box and Whisker Plots
To the tune of:
http://www.youtube.com/watch?v=cfR7qxtgCgY
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Verse 1
So, sit right back and I’ll tell a tale.
A tale of a guy named Scott.
He figured out how to draw a Box and Whisker plot
Repeat (A box and whisker plot)
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Verse 2
He said, “Take your pencil and write the numbers
In order from least to great.”
Then find the number in the middle and draw a line through it.
Repeat: Yes, draw a line through it.
10 19 25 28 29 29 30 32 32 34 34 35 36 40 45 55 58 72
Median: 33
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Verse 3
This number is called the median
It splits the data in half.
We call the left the lower half
And the right the upper half.
Repeat: The right is the upper half.
10 19 25 28 29 29 30 32 32 34 34 35 36 40 45 55 58 72
Median: 33
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Verse 4Now, concentrate on the lower half.
It takes a little while.
Find the median of this half.
It’s called the lower quartile.
Repeat: (It’s called the lower quartile)
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Verse 5Now, switch your attention to the other
half.
And do it with a smile!
Now find the median of this half,
It’s called the Upper Quartile.
Repeat: (It’s called the Upper Quartile)
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Verse 6This is so exciting now.
Because we’re almost done.
We need to write four numbers in a row
On a number line.
Repeat: (on a number line)
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Verse 7Start by plotting the two quartiles with
the median in between
Then draw a box around the three
With the median in between.
Repeat (With the median in between)
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Verse 8So, something that will
make you feel
Like you’re really smart.
Is if you can remember that
The box is 50 percent.
Repeat (The box is 50 percent)
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Verse 9Hey, did you forget the
important whisker part?
My teacher said, “That’s a sin!”
You have to draw a line from the box
A line that goes to the max and min
Repeat: (A line that goes to the max and min)
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Verse 10Next, we need to remember that
The data on each whisker part
Makes 25 percent of the plot
And now we’re truly smart.
Repeat (Yes, now we’re truly smart)
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Verse 11
So, that’s the end of our tale about a guy named Scott.
NO, he really doesn’t exist.
But now you can remember the steps
Without writing a list.
Repeat : (Without writing a list!)
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Human Box and Whisker Plot Everyone should have a post it note Write your shoe size down on the post it
note Stick the post it note on the board Put the numbers in order Find the median, lower quartile, upper
quartile, least, and greatest Put the flags on the five numbers Create the box and whiskers
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Use the data to make a box-and-whisker plot.
42 22 31 27 24 38 35
20 22 24 26 28 30 32 34 36 38 40 42
Lower Extreme:Upper Extreme:Median = Lower Quartile = Upper Quartile =
Example/Practice #1
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Use the data to make a box-and-whisker plot.
42 22 31 27 24 38 35
22 24 27 31 35 38 42
20 22 24 26 28 30 32 34 36 38 40 42
Least = 22Greatest = 42Median = 31Lower Quartile = 24Upper Quartile = 38
Example/Practice #1
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Use the data to make a box-and-whisker plot.
73 67 75 81 67 75 85 69
Lower Extreme= = Upper Extreme=
Median = Lower quartile =
64 66 68 70 72 74 76 78 80 82 84 86
Upper quartile =
Example/Practice #2
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Use the data to make a box-and-whisker plot.
73 67 75 81 67 75 85 69
67 67 69 73 75 75 81 85+
=742
Least = 67Greatest = 85
Median = 74Lower quartile = 68
64 66 68 70 72 74 76 78 80 82 84 86
+ +22
= 68 = 78Upper quartile = 78
Example/Practice #2
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Example/Practice #3
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Example/Practice #4
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More Practice
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More Practice
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Closing List 2 things you have learned about
mean, median, mode, range, and box and whisker plots.