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# Stem-and-leaf graphs

TLF ID L5911

Find out what a stem-and-leaf graph is and use it to investigate the truth about different conjectures. Work through a tutorial about stem-and-leaf graphs, and then choose an investigation from a set of three. Enter your own data in some investigations. For example, test the reaction time of your preferred hand against your non-preferred hand. Construct a stem-and-leaf graph, calculate the mean and identify the median. Use the graph, the mean and median to draw a conclusion about the conjecture. This learning object is a combination of four learning objects in the same series.

#### Educational details

Key learning objectives
• Students interpret and explore two sets of data represented in back-to-back stem-and-leaf graphs.
• Students use data and data handling processes to assist in identifying the truth behind a theory.
• Students compare information derived from two data sets.
Educational value
• Introduces students to the features and uses of back-to-back stem-and-leaf graphs.
• Allows students to enter and add personal data in the construction of stem-and-leaf graphs.
• Includes authentic data in the construction of back-to-back stem-and-leaf graphs.
• Includes a tutorial about stem-and-leaf graphs that is accessible at all points throughout the activities.
• Tests student understanding of information revealed by the data.
• Dynamically displays and sorts data values on a back-to-back stem-and-leaf graph.
Year level

7

Learning area
• mathematics
Strand
• Mathematics/Statistics and probability
Concept
• Mathematics/Bivariate data
• Mathematics/Data analysis
• Mathematics/Graphs
Skill
• Knowledge;
• Comprehension;
• Application;
• Analysis
Student activity
• Interactives;
• Experiment;
• Analysis;
• Modelling;
• Data manipulation and interpretation;
• Estimation
Learning design
• Experiential learning;
• Independent learning;
• Problem solving;
• Visual learning

#### Other details

Contributors
• Publisher
• Date of contribution: 20 Sep 2013
• Organisation: Education Services Australia
• Address: Melbourne VIC 3000 Australia
• URL: http://www.esa.edu.au/
• Script writer
• Name: Michael Wagner
• Organisation: Godwin + Wagner
• Address: Box Hill South Victoria 3128 Australia
• URL: www.michaelwagner.com.au
• Subject matter expert
• Name: Howard Reeves
• Address: Lindisfarne Tasmania 7015 Australia
• Educational validator
• Name: Graham Jones
• Address: Gold Coast QLD Australia
• Technical implementer
• Organisation: CSIRO Publishing
• Address: Collingwood Victoria 3066 Australia
• URL: www.publish.csiro.au
Access profile
• Colour independence
• Device independence
• Hearing independence
Learning resource type
• Interactive Resource
Browsers
• Microsoft Internet Explorer - minimum version: 8.0 (MS-Windows) - maximum version: 9.0 (MS-Windows)
• Firefox - minimum version: (MS-Windows)
• Safari - minimum version: 5.1 (MacOS)
Operating systems
• MacOS - minimum version: 10.6
• MS-Windows - minimum version: XP - maximum version: 7
Rights
• © Education Services Australia Ltd, 2013, except where indicated under Acknowledgements.

Includes: