Chapter 8: Data Analysis Notes

Sections

1. 8A Statistical investigations and surveys Mastered

   The statistical investigation process, writing a clear survey question, designing good survey questions and choices, and collecting data ethically.

   Open notes
2. 8B Sampling and bias Mastered

   Census and sample, random, systematic, stratified and self-selected sampling, representative samples, and the faults that bias survey results.

   Open notes
3. 8C Types of data and frequency tables Mastered

   Categorical (nominal and ordinal) and numerical (discrete and continuous) data, ungrouped and grouped frequency tables, cumulative and relative frequency, and class centres.

   Open notes
4. 8D Graphs and the shape of data Mastered

   Dot plots, stem-and-leaf plots, histograms and frequency polygons, sector graphs and divided bar graphs, line graphs, choosing a graph, describing shape, and spotting misleading graphs.

   Open notes
5. 8E Measures of centre and spread Mastered

   Mean, median and mode, choosing the best measure of centre, modality, range and population standard deviation, and comparing two data sets.

   Open notes
6. 8F Quartiles, box plots and outliers Mastered

   Quartiles and the interquartile range, five-number summaries and box plots, comparing data sets with parallel box plots, and identifying outliers with the 1.5 × IQR rule.

   Open notes