Statistics
Core distribution and hypothesis-test pages for IB AI, IB AA and IGCSE enrichment.
Statistics
Statistics
Normal distribution and hypothesis testing.
StatisticsNormal Distribution
Mean, standard deviation and probabilities.
StatisticsStandard Normal Variable and z-scores
Standardising normal variables.
StatisticsThe 68–95–99.7 Rule
Empirical rule for normal distributions.
StatisticsChi-squared Test
Observed versus expected frequencies.