Stem and Leaf Plots and Dot Plots

Construct and compare a range of data displays including stem-and-leaf plots and dot plots(ACMSP170)

LO: To construct and compare data from a stem-and-leaf and dot plots
Know:

  • What is a stem-and-leaf plot
  • How to interpret a stem-and-leaf plot
  • How to interpret a graph

Understand:

  • That stem-and-leaf plots are a graphical way of helping us organise data which makes it easier to interpret.

Do:

  • I can construct and compare data from a stem-and-leaf plot
  • I can construct and compare data from a dot plot.

Visual Representations

Notes

Stem-and-leaf plots are an easy way of helping us to organise data.

You basically break the numbers apart (partitioning).
Eg.) 47 can be broken into 4-10s and 7-1s.

The 4 then becomes your stem, and 7 becomes your leaf.

Notice how 21, 23, 23, 26 and 26 are all written on the same line.

Stem-and-Leaf plots also helps us to arrange the numbers into ascending order (smallest to biggest). This then allows us easily to find the minimum and maximum values to calculate range. The most common number is also easily represented to identify the mode. The middle number is also easily identifiable to determine the median.

Stem and Leaf Plot Videos

 Student Generated Videos

Practice Questions

Year 7 Big Ideas

Exercise 10F pg. 375 Now Try These: Q. 1-3

My Maths 7

Exercise 10F pg. 551 Q. 1-13

My Maths 8

Exercise 9D pg. 477 Q. 1-19

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