Correlation and Regression skill check
A timed check of correlation, least squares, inference and intervals, multiple and logistic regression, diagnostics and validation.
- Questions
- 12
- Time
- 30 min
- Pass mark
- 70%
- Retake after
- 6 h
Skills covered
Calculate and interpret covariance · Calculate and interpret Pearson's correlation · Test a correlation and give a confidence interval · Use Spearman's and Kendall's rank correlations · Distinguish correlation from causation · Identify confounding, reverse causation and coincidence · Fit a least-squares regression line · Predict with a regression model · Interpret slopes and intercepts in context · Recognise extrapolation · Interpret R² and the residual standard error · Diagnose a model from residual plots · Check the LINE assumptions · Test and estimate a regression slope · Distinguish confidence and prediction intervals · Fit and interpret multiple regression · Compare models with adjusted R² and F tests · Code and interpret categorical predictors · Recognise and interpret interactions · Diagnose multicollinearity with VIFs · Assess leverage, outliers and influence · Use and interpret log transformations · Fit and use a logistic regression · Interpret odds and odds ratios · Evaluate a classifier at a threshold · Recognise overfitting · Evaluate models on held-out data
Covers Track 9: Correlation and Regression. Passing it, together with completing every lesson, earns the track certificate.
How it works
- Questions are drawn from this assessment's own bank, with numbers generated for your attempt.
- Your answers save automatically. Nothing is graded until you submit or the time runs out (the server keeps the time).
- No hints or feedback during the attempt; full worked solutions afterwards.
- You may use a calculator, the lab and your notes. The assessment is not proctored.