Log in Start learning

Module 7

Statistics and Mathematics

Describe data honestly, quantify uncertainty, test hypotheses and model relationships — explained in business language.

Difficulty:All beginner intermediate advanced expert

Descriptive Statistics

Centre, spread, shape and outliers.

Describing data

✓Descriptive statistics — centre, spread, shape and outliersDescribe a distribution honestly with the right measure of centre and spread, recognise skew, and detect outliers with IQR and z-scores — with every calculation shown.Beginner70 min

Relationships and Regression

Correlation, covariance and linear regression.

Correlation and regression

✓Correlation, covariance and linear regressionMeasure how variables move together, fit a straight line, interpret coefficients, intercept and residuals in business terms, and check the assumptions behind them.Intermediate75 min

Probability and Inference

Sampling, confidence intervals, tests and A/B testing.

Inference

✓Probability, sampling, confidence intervals, hypothesis tests and A/B testingQuantify uncertainty — and use it to decide whether a new checkout really converts better. Worked end to end on a real A/B test.Intermediate90 min

Causality and Time

Causal reasoning and time-series concepts.

Causality and time series

✓Correlation vs causation, causal inference and time-series conceptsWhy correlations mislead, how analysts get closer to causal answers without a perfect experiment, and the building blocks of time series — trend, seasonality, noise and autocorrelation.Advanced60 min