Statistics study guides
CCEA-GCSE · GCSE (CCEA) · aligned to CCEA.
- Averages and measures of spread - CCEA GCSE Statistics guide to mean, median, mode, range, quartiles, standard deviation and standardised scores
A CCEA GCSE Statistics guide to averages and measures of spread: the mean, median, mode and weighted mean, the mean from frequency and grouped tables, the range, quartiles, interquartile range, percentiles, standard deviation, box plots, outliers, standardised scores and skewness.
📖 13 min read2260 Unit 1 - Collecting data - CCEA GCSE Statistics guide to sampling methods, types of data and questionnaire design
A CCEA GCSE Statistics guide to collecting data: sampling frames and the random, systematic, stratified, quota, cluster and convenience methods, the stratified-sample calculation, types of data, primary versus secondary sources, and designing unbiased questionnaires and data-collection sheets.
📖 12 min read2260 Unit 1 - Probability - CCEA GCSE Statistics guide to theoretical and experimental probability, tree diagrams, Venn diagrams and expected frequency
A CCEA GCSE Statistics guide to probability: theoretical and experimental probability, relative frequency, sample spaces, the addition and multiplication laws, mutually exclusive and independent events, tree and Venn diagrams, expected frequency and risk.
📖 12 min read2260 Unit 1 - Processing and representing data - CCEA GCSE Statistics guide to tables, charts, stem-and-leaf, histograms and cumulative frequency
A CCEA GCSE Statistics guide to processing and representing data: frequency and two-way tables, pictograms, bar charts, pie charts, stem-and-leaf diagrams, frequency polygons, histograms with frequency density, and cumulative frequency curves, with the methods CCEA rewards.
📖 12 min read2260 Unit 1 - Quality assurance - CCEA GCSE Statistics guide to control charts, warning and action limits
A CCEA GCSE Statistics guide to quality assurance at Higher tier: sampling in quality control, control charts for the sample mean and range, warning and action limits, and deciding when a process is in or out of control.
📖 10 min read2260 Unit 2 (Higher) - Scatter diagrams and correlation - CCEA GCSE Statistics guide to correlation, the line of best fit and Spearman's rank
A CCEA GCSE Statistics guide to scatter diagrams and correlation: types and strength of correlation, the line of best fit, interpolation versus extrapolation, correlation versus causation, and calculating and interpreting Spearman's rank correlation coefficient.
📖 11 min read2260 Unit 2 - The normal distribution - CCEA GCSE Statistics guide to the bell curve, the 68 to 95 to 99.7 rule and standardised scores
A CCEA GCSE Statistics guide to the normal distribution at Higher tier: the symmetrical bell shape and its properties, the 68 to 95 to 99.7 rule for one, two and three standard deviations, using symmetry to find tail proportions, and standardised scores.
📖 10 min read2260 Unit 2 (Higher) - The statistical enquiry cycle - CCEA GCSE Statistics guide to planning, hypotheses, populations and evaluating an investigation
A CCEA GCSE Statistics guide to the statistical enquiry cycle: the four stages, writing a testable hypothesis, planning an investigation, populations versus samples, and interpreting and evaluating results the way CCEA rewards in Unit 1 and the Unit 2 case study.
📖 11 min read2260 Unit 1 - Time series and index numbers - CCEA GCSE Statistics guide to moving averages, trend lines, seasonal variation and index numbers
A CCEA GCSE Statistics guide to time series and index numbers: plotting a time series, calculating moving averages, trend lines and seasonal variation, and simple, weighted and chain-base index numbers including the RPI and CPI.
📖 12 min read2260 Unit 2