# Mystery spinner: match the graph

Learning Material, Learning Guide, Learning Module  |  Interactive Lesson  |  RAR

Published on 2018 July 30th

Description
Look at results in a frequency graph compiled after testing an unseen spinner. Work out the likely proportions of colours in the mystery spinner. Use a tool to build a new spinner (a dial with a pointer). Choose up to three equal-sized sectors. Fill the sectors with up to three colours. For example, make a three-part spinner with one red sector and two blue sectors. Test the new spinner over a number of spins. Look at a graph of the test results. Compare it to the graph generated by the mystery spinner. Are the results similar? This learning object is the first in a series of three objects that progressively increase in difficulty.
Objective
1. Students explore the difference between the information provided by short-run, medium-run and long-run data.
2. Students explore the relationship between sample space and likelihood of outcomes.
3. Students analyse experimental data to identify mathematical equivalence in random generators.
4. Students interpret data in tables and graphs.