Notes
Reading material from teachers and learners: theory, worked examples and questions that make you think. Some notes are made with AI, and they always say so.
Choose a topic to see its subtopics.6 notes
Averages: Mean, Median and ModeMiddle Stage (6–8)
A Data Project from Question to Report
The Weather Project: the six steps of a data project, showing a month of weather, its centre, spread and chances, linked days, and an honest report with a limit. With a worked example, practice, a program and questions.
Probability and ChanceMiddle Stage (6–8)
Probability: Quick Revision
A brief note on Chance: probability by counting, the chance that something does not happen, relative frequency and the long run, two events together, at least one, and taking without putting back. With a worked example, practice, a program and questions.
Spread of DataMiddle Stage (6–8)
Range, IQR and Standard Deviation: Quick Revision
A brief note on Spread: the range, quartiles and the IQR, box plots, the variance and the standard deviation, which measure to use, and what adding or multiplying does to the spread. With a worked example, practice, a program and questions.
Data and SamplingMiddle Stage (6–8)
Data Tables, Kinds of Data and Fair Samples
A brief note on What Is Data?: tables of cases and variables, the four kinds of data, and how to choose a fair sample and ask a fair question. With a worked example, practice, a program and questions.
Tables and GraphsMiddle Stage (6–8)
Reading a Graph Honestly
A brief note on Tables and Graphs: frequency tables, shares, bar and pie charts, histograms and line graphs, and a checklist to spot a graph that misleads. With a worked example, practice, a program and questions.
Averages: Mean, Median and ModeMiddle Stage (6–8)
Mean, Median or Mode? Choosing the Right Average
A brief note on Averages: the mean, the median and the mode, a missing value, two groups together, and which average to use when one value is far from the rest. With a worked example, practice, a program and questions.