Free games · a companion to the statistics books

Statistics Games

Every statistics and research-methods idea that NBE has asked in DNB, DrNB and Diploma theory papers, turned into a short game. You play a few rounds, and the idea is clear before you see the formula. Each game ends with the formula, the DNB questions it answers, and the book chapter to read next.

21 games966 DNB questions covered

Want the full explanation? Read the Research Methodology and Practical Statistics books. Each game links to its chapters.

Diagnostic tests

  1. 01Set the cut-offPlay nowSensitivity, specificity, PPV and NPV, and why PPV falls when a disease is rare. 49 DNB questions.
  2. 02Draw the ROC curvePlay nowROC curves, area under the curve and choosing the best cut-off. 21 DNB questions.
  3. 03Before and after the testPlay nowLikelihood ratios, pre-test and post-test probability, and Bayes' rule. 10 DNB questions.

Study designs, risk and bias

  1. 04Name the study designPlay nowCross-sectional, case-control, cohort and trial designs, and PICO. 118 DNB questions.
  2. 05Fill the two-by-two tablePlay nowRelative risk, odds ratio, attributable risk, ARR, RRR and NNT. 90 DNB questions.
  3. 06Find the biasPlay nowSelection, information and screening biases, and confounding. 49 DNB questions.

Clinical trials

  1. 07Run a fair trialPlay nowRandomisation, allocation concealment, blinding, intention-to-treat and per-protocol analysis. 78 DNB questions.
  2. 08Design the trialPlay nowPhases of trials, placebo, crossover and factorial designs, superiority and non-inferiority. 113 DNB questions.

Testing and estimation

  1. 09Pick the testPlay nowTypes of data, and when to use the t-test, chi-square, ANOVA or a non-parametric test. 71 DNB questions.
  2. 10Is it significant?Play nowP-values, confidence intervals and the null hypothesis. 77 DNB questions.
  3. 11Power and sample sizePlay nowType I and type II errors, power, and what drives sample size. 72 DNB questions.
  4. 12Draw the samplePlay nowSimple random, systematic, stratified, cluster and non-probability sampling. 37 DNB questions.
  5. 13Guess the correlationPlay nowCorrelation coefficients, regression lines, and correlation without causation. 31 DNB questions.
  6. 14Read the survival curvePlay nowKaplan-Meier curves, censoring, median survival, log-rank test and hazard ratio. 26 DNB questions.
  7. 15Read the forest plotPlay nowMeta-analysis, forest and funnel plots, heterogeneity, and levels of evidence. 126 DNB questions.

Describing data and agreement

  1. 16Shape of the dataPlay nowNormal distribution, mean, median, SD and SE, skew, and choosing a graph. 32 DNB questions.
  2. 17Do the observers agree?Play nowCohen's kappa, chance agreement, and agreement versus correlation. 7 DNB questions.

Public health and research practice

  1. 18Compare the ratesPlay nowIncidence and prevalence, mortality rates, and direct and indirect standardisation. 14 DNB questions.
  2. 19Investigate the outbreakPlay nowSteps of outbreak investigation and reading the epidemic curve. 19 DNB questions.
  3. 20Sit on the ethics committeePlay nowInformed consent, ethics committee review and good clinical practice. 30 DNB questions.
  4. 21Spend the health budgetPlay nowQALY, DALY, cost-effectiveness and the ICER. 20 DNB questions.

The games use made-up numbers for teaching. The question lists come from NBE theory papers held on SolvedPGSS. Your best score is kept in this browser only.