Statistics

Statistics

Core distribution and hypothesis-test pages for IB AI, IB AA and IGCSE enrichment.

Statistics

Statistics

Normal distribution and hypothesis testing.

Statistics

Normal Distribution

Mean, standard deviation and probabilities.

Statistics

Standard Normal Variable and z-scores

Standardising normal variables.

Statistics

The 68–95–99.7 Rule

Empirical rule for normal distributions.

Statistics

Chi-squared Test

Observed versus expected frequencies.

Normal distribution and testing extensions

Statistics

Inverse Normal

Work backwards from probability to value.

Statistics

Unknown Mean or Standard Deviation

Find parameters from probability information.

Statistics

Chi-squared Interpretation

p-values, critical values and conclusions.