Pictographs, Dot Plots, & Stem and Leaf

Pictograph:

    -Used to represent tallies of catergories. A symbol or an icon is used to represent a quantity of        items.  A legend is used to tell what a symbol represents.

Pictograph pictures and lessons

Dot Plots (Line Plot):

    -Provides quick and easy way of organizing data.

• Outlier: number on a dot plot that is far from the others
• Cluster: isolated group of points
• Gap: a large space between data points
• Mode: the data value that occurs most often

 

Stem and Leaf Plots:

    -A number line that is usually vertical, with digits that are used to represent data.  It is easily created by hand.

 

 

For example if a teacher had a list of numbers they could be placed in the plot like they are below.