Stem-and-Leaf Plots and Bar Graphs

Today we learned how to collect and organize discrete primary data and display the data in charts, tables, and graphs such as a stem-and-leaf plot and bar graph. Below you will find a summary of what we learned today to help you prepare for your upcoming Data Management test.

A stem-and-leaf plot is a type of graph that summarizes a set of data. The data is arranged by place value. The digits in the largest place is referred to as the stem and the digits in the smallest place are referred to as the leaf (leaves). The leaves are always displayed to the left of the stem. Stem-and-leaf plots are a great way to organize large amounts of information. I have provided an example below.

Data: 12 15 15 16 16 17 18
20 20 20 20 22 25 26
30 31 31 31 33 35 35 38
48 48 49


A bar graph is a type of graph that visually displays information using a series of bars or rectangles. Refer to example below.

The bar graph shows the total number of student absences on different days of the week over a single semester at an Ohio middle school. The height of the bars represents the number of absences.



Try this quiz to help you with your bar graphing skills.

Tomorrow we will be collecting data by conducting a class survey. The topic will be favourite meals and favourite ice cream flavour. If you have any ideas please let me know, I am open to ideas. See you tomorrow!

Reminder: Math Test on Thursday! (Come see me if you would like to review any concepts you are having difficulties with).