stem-and-leaf plots are used to show the rate at which certain values occur. this would be used if...

Stem and Leaf PlotBy: Dylan Henry, Brett Marberger,

and Patty O’Neill

Definition Stem-and-leaf plots are used to show

the rate at which certain values occur. This would be used if you are a teacher and you need to record test scores.

http://www.purplemath.com/modules/stemleaf.htm

These are test scores from a Science test.

http://chaversmapcatelog.blogspot.com/2010/12/stem-and-leaf-plot.html

Necessary Data To have a stem and leaf plot, you need a

single set of data that is organized numerically. The data is organized numerically because it involves numbers and place values.

Mrs. Ellwood’s brain

If Shaniqua’s grade has not yet been put in, what grade will she need to make the class average 93 if this is a possible grade to get?

Grades for the 2nd Marking Period of Period 7 Honors Algebra 1 Students

6

7

85 6 8 8 9 9

90 1 1 2 2 2 3 3 3 3 4 4 4 5

8 l 5 = 85%

Key

How to Create a Stem and Leaf Plot

Create a problem Collect data pertaining to the problem Make a big “t” Put the greatest place value digit on

the left side of the “t” in numerical order

Put the least place value digit on the right side of the “t” in numerical order

Advantages

Shows specific data Organized, ordered data

Dylan’s brain, Brett’s brain, and Patrick’s brain

Disadvantages

Data can be overloaded on one line and looks awkward.

Not informative for a small set of data

http://www.slideshare.net/bujols/stem-leaf-bar-graphs-and-histogramsPatrick’s brain, Dylan’s brain, and Brett’s brain

CreditsTyper: Patty

Thinker: Dylan, Brett, PattyProducer: PattyDirector: Dylan

Entertainer: BrettEditor: Spell Check

Stunt Double 1: George WashingtonStunt Double 2: John C. Calhoun

Stunt Double 4: Antonio Lopez de Santa AnnaStunt Double 3: R.I.P

Creepy Guy Watching from Under Table: IdkFood Supplier: Mr. Creeden

The “Kumbaya” Guy: Austin LordiThe Calculator: The Calculator

131%The Computer: A Dell

Above Joke: BrettLuke’s Father: Dylan

The Baddest of them All: BrettHarlem Shake ”Just Do It” Nike