Dot Plots and Stem-and-Leaf Plots

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Learning objective overview

Master Teaching Guide coverage for this objective.

Current NZC (2007)

S3-1
S4-1

New NZC (2026)

NZC26-P4-STA-VIS-K-Y9-01
NZC26-P4-PRO-ETP-P-Y9-05

Resources

CorbettMaths - Stem and Leaf DiagramsQuestions PDF · Answers
CorbettMaths - Stem and Leaf Diagrams Workout

Terminology

Dot plot
Stem-and-leaf plot
Stem
Leaf
Key
Back-to-back stem-and-leaf plot
Mode
Median
Range
Outlier
Distribution

Task goals

Foundation: Construct a dot plot from a small numeric data set and read off simple features such as the mode and range.
Proficient: Construct an ordered stem-and-leaf plot (with a key) from raw data and describe the distribution's shape, centre, and spread.
Excellence: Construct and compare a back-to-back stem-and-leaf plot or two dot plots for two related data sets, discussing shape, centre, spread, and any outliers to justify a conclusion in context.

Where this fits

What leads into this objective, and where it goes next.

Before

Probabilities from experiments and statistical displays

Probabilities from experiments and statistical

F/T

You are here

Dot Plots and Stem-and-Leaf Plots

Know

A distribution is formed from all the possible values of a variable and their frequencies. It can be shown using data visualisations that show patterns, trends, and variations and that include dot plots, bar graphs, frequency tables, box plots, histograms, time-series graphs, scatter plots, and two-way tables.

Statement▸

Year 9 · Statistics · Visualisation of data

NZC26-P4-STA-VIS-K-Y9-01

Creating and describing data visualisations for the distribution of observed outcomes from a chance experiment

Statement▸

Year 9 · Probability · Experimental and theoretical probability

NZC26-P4-PRO-ETP-P-Y9-05