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Stem and Leaf Plots

Stem and Leaf Plots. By Mr. Chancellor. Stem and Leaf Plots. Stem and Leaf Plots show visually the distribution of data, while also showing the value of numbers. What is a Stem and Leaf Plot?. 4 1 2 3 5 5 2 4 6 6 1 2 4 7 3 4 8. Making a Stem and Leaf Plot.

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Stem and Leaf Plots

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  1. Stem and Leaf Plots By Mr. Chancellor

  2. Stem and Leaf Plots • Stem and Leaf Plots show visually the distribution of data, while also showing the value of numbers

  3. What is a Stem and Leaf Plot? • 4 1 2 3 5 • 5 2 4 6 • 6 1 2 4 • 7 3 4 8

  4. Making a Stem and Leaf Plot Make the list into a Stem and Leaf Plot. 8,6,16,14,12,17,6,6,9,11,11,12,16,7,17,10 (This is the same list from my baseball pitcher!) 0 6 6 6 7 8 9 1 0 1 1 2 2 4 6 6 7 7

  5. Finding the Range using Stem and Leaf Plots 0 6 6 6 7 8 9 1 0 1 1 2 2 4 6 6 7 7 17 – 6 = 11, therefore the range is 11 Range is the difference between the maximum value and minimum value. (Max value – Min. value)

  6. How to find the Mean, Median, and Modehttp://www.youtube.com/watch?v=uydzT_WiRz4 • To find the Mean or average of numbers: 8,5,3,5,10,7,6,4 = 48/8 Mean is 6 • To find the Median (the value in the middle) of a number set: • 8,5,3,5,10,7,6,4 – Take the numbers and sort them! • 3,4,5,5,6,7,8,10 = We have two middle # (5+6/2=5.5) To find the Mode (or the number that shows up the most) 8,5,3,5,10,7,6,4=5

  7. Box and Whisker PlotsDividing data into Quartiles Quartiles is another way of saying dividing the data into quarters of fourths. • First, find the median (the middle number) • Next, find the middle of the lower number, (not including the median), this is the first quartile Q1 • Lastly, find the middle of the greater value, (not including the median), this is the third quartile Q3

  8. Find Q1 and Q3 for Box and Whisker Plot 6 6 6 7 8 9 10 11 11 12 12 14 16 16 17 17 6 6 6 7 8 9 10 11 11 12 12 14 16 16 17 17 Least Q1 Q2 Q3 Greatest First find the median (the middle number) = 11 (which is the Q2)

  9. Creating Scatter Plots • The following numbers are saves in a year for another one of Mr. Chancellor’s favorite pitchers! We will find out: • How to plot data on a scatter plot • To see if there is a correlation 9 8 7 6 5 4 3 2 1 Saves Years 99 01 02 03 04 05 06 07 08

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