Assessments
Show what you can do
Assessments draw questions from their own question banks with fresh numbers for every attempt, so they measure skill rather than memory. Answers save as you work; everything is graded on submission, and you see worked solutions afterwards.
Placement diagnostic
Skill checks
- Statistical Thinking skill checkPopulations and samples, variables and scales, study design, bias, confounding, uncertainty and critiquing claims — mostly scenario judgements plus a few quick calculations. 12 questions, 30 minutes, 70% to pass.12 questions · 30 minutes · pass mark 70% · Track 1 · Free
- Describing Data skill checkFrequency tables, measures of centre and spread, quartiles, outliers, z-scores, shape, robust summaries and grouped data — calculated on fresh numbers and interpreted. 12 questions, 30 minutes, 70% to pass.12 questions · 30 minutes · pass mark 70% · Track 2 · Free
- Visualising and Exploring Data skill checkChoosing charts, reading bar charts, histograms, box plots, densities, scatter plots, time series, ECDFs, Q-Q plots and heatmaps, spotting misleading designs, and making charts accessible and clear — with fresh numbers to read and compute. 12 questions, 30 minutes, 70% to pass.12 questions · 30 minutes · pass mark 70% · Track 3 · Members
- Probability skill checkSample spaces, the addition and multiplication rules, conditional probability and independence, two-way tables, trees, Bayes' theorem and base rates, counting, expected value and simulation — calculated on fresh numbers and interpreted. 12 questions, 30 minutes, 70% to pass.12 questions · 30 minutes · pass mark 70% · Track 4 · Members
- Probability Distributions skill checkRandom variables, the binomial, geometric, hypergeometric, Poisson, uniform, exponential and normal models, quantiles, critical values and model checking — on fresh numbers. 12 questions, 30 minutes, 70% to pass.12 questions · 30 minutes · pass mark 70% · Track 5 · Members
- Sampling and the Central Limit Theorem skill checkSampling designs and allocation, bias and weighting, standard errors, the law of large numbers, the central limit theorem, the finite population correction and sample-size planning — on fresh numbers. 12 questions, 30 minutes, 70% to pass.12 questions · 30 minutes · pass mark 70% · Track 6 · Members
- Estimation and Confidence Intervals skill checkPoint estimates, standard errors, margins of error, z and t intervals, proportion intervals (Wald and Wilson), Welch, paired and difference-in-proportion intervals, sample-size planning and the bootstrap — calculated on fresh numbers and interpreted correctly. 12 questions, 30 minutes, 70% to pass.12 questions · 30 minutes · pass mark 70% · Track 7 · Members
- Hypothesis Testing skill checkHypotheses, p-values, errors and power, one- and two-sample t-tests, paired and proportion tests, effect sizes, assumptions, multiple testing and reporting — on fresh numbers. 12 questions, 30 minutes, 70% to pass.12 questions · 30 minutes · pass mark 70% · Track 8 · Members
- Correlation and Regression skill checkA timed check of correlation, least squares, inference and intervals, multiple and logistic regression, diagnostics and validation.12 questions · 30 minutes · pass mark 70% · Track 9 · Members
- Comparing Groups and Categorical Data skill checkA timed check of contingency tables, chi-square tests, ANOVA and post-hoc comparisons, factorial and repeated-measures designs, rank tests and test choice.12 questions · 30 minutes · pass mark 70% · Track 10 · Members
- Experiments and A/B Testing skill checkA timed check of experiment design, A/B analysis, error control across looks, variants and segments, guardrails and decisions.12 questions · 30 minutes · pass mark 70% · Track 11 · Members
- Time Series and Forecasting skill checkA timed check of time-series structure, benchmark and smoothing forecasts, error measures, honest evaluation, decomposition, autocorrelation, AR models, prediction intervals and structural breaks.12 questions · 30 minutes · pass mark 70% · Track 12 · Members
- Resampling and Statistical Reasoning skill checkA timed check of bootstrap and permutation inference, Monte Carlo error, robust statistics, missing data, sensitivity analysis, Simpson's paradox, selection bias, multiple testing and honest, reproducible reporting.12 questions · 30 minutes · pass mark 70% · Track 13 · Members
- Practical Data Analysis skill checkA timed check of importing and typing data, missing values, duplicates and invalid entries, cleaning rules and their effect, grouping, transformations, method choice, reporting and reproducibility.12 questions · 30 minutes · pass mark 70% · Track 14 · Members
- Applied Statistics for Professionals skill checkA timed check of applied methods across sales, finance, credit, HR, quality, marketing, surveys, published results and public-health rates.12 questions · 30 minutes · pass mark 70% · Track 15 · Members
- Advanced Foundations skill checkA timed check of Bayesian updating, credible intervals, Bayesian A/B decisions, PCA, classifier evaluation, causal reasoning and honest reporting of model limits.12 questions · 30 minutes · pass mark 70% · Track 16 · Members
Final assessments
- Statistical Foundations — final assessmentA 60-minute exam across the whole Statistical Foundations pathway: study design, describing and charting data, probability, distributions, sampling, confidence intervals and hypothesis tests — including multi-step questions on the library datasets.25 questions · 60 minutes · pass mark 70% · Members
- Business Data Analysis — final assessmentA 60-minute exam across the Business Data Analysis pathway: study design, describing and charting data, hypothesis tests, regression, group comparisons and data cleaning — with an emphasis on choosing the right method and interpreting results on realistic business datasets.25 questions · 60 minutes · pass mark 70% · Members
- Experimentation and A/B Testing — final assessmentA 60-minute exam across the Experimentation pathway: probability, sampling, estimation and hypothesis testing applied to experiments, then designing, sizing, validating, analysing and deciding from A/B tests — including multi-step questions on the checkout and pricing test datasets.25 questions · 60 minutes · pass mark 70% · Members
Assessments are open-book and not proctored. They are designed for learning and for Statistics Quest certificates of completion, which are not academic or professional accreditations.