stem and leaf line plot - bcsdschools.net€¦ · stem and leaf line plot draw a back-to-back...
Post on 26-Sep-2020
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Stem and Leaf Line Plot
Dot plots:- Number line with dots on it- Dots represent data given- Must have a dot for each piece of data
outlier: A value that lies outside the rest of the data
What every dot plot needs:- Title- Numbers labeled on numbe rline- Dot for every data value given
1) The average, in millions, of trash in a certain area over the course of a year and a half
1.4 1.5 2.0 3.1 2.1 1.0 1.5 1.8 1.2 1.3 2.5 3.0 3.1 2.1 2.6 2.7 2.5 3.5
Stem and Leaf Line Plot
Stem-and-leaf plot musts:1) 2) 3) 4)5)
Title
Key
Each data value is represented by one "stem" and "leaf"
There is only ONE "leaf" per data value
NO decimals inside a S&L plot. The key tells us where the decimals are
*** "Leafs" go in increasing order ***
Stem and Leaf Line Plot
Steps to create your stem and leaf plot1) Find the smallest value2) Find the largest value3) Put in the stems4) Put in the leaves5) Include a key and title
Stem and Leaf Line Plot
Draw a stem-and-leaf plot:1) The grade of the first test in a statistic course:
100 89 93 67 82 87 73 70 83 92 65 75 85 85 88 89100 103 68 79 88 89 91 97
3) The average, in millions, of trash in a certain area over the course of a year and a half
1.4 1.5 2.0 3.1 2.1 1.0 1.5 1.8 1.2 1.3 2.5 3.0 3.1 2.1 2.6 2.7 2.5 3.5
Stem and Leaf Line Plot
Back-to-back stem-and-leaf plot:
Exact same as a regular stem-and-leaf plot except for the data on the left the leaves are "backwards"
*Just remember that the smallest number for the leaves is always the closest to the stem*
The ACT scores of 2 different schools are given, make a back-to-back stem-and-leaf plot:Stratford: 24 18 19 25 32 30 29 23 2115 28 34 18 25 28 22 21 23
The Creek: 23 18 19 26 30 30 32 17 25 32 32 34
28 29 26 25 21 29
Stem and Leaf Line Plot
Draw a back-to-back stem-and-leaf plot comparing the number of years teachers have been teaching from two different high schools:
Timberland: 1 1 3 6 10 9 15 29 32 4 12 16 18 21 23 25 17 14 8 6 40
Hanahan: 1 3 8 10 13 16 1425 29 30 31 6 9 121 4 5 8 9 12 23
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