Martin Poulter, DeSTRESS project
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Licences: Creative Commons Attribution-Sharealike (text content); MIT Licence (Javascript code)
- Effect on trendlines of censoring data
regression line; effect of choosing starting point
- Evaluating the Rule of 70
exponential growth; percentage error
- Mean versus median: film ratings
robustness of median relative to the mean
- Pearson versus Spearman correlations
types of correlation; similarities and differences
- Skew, mean and median
mode, mean, median of continuous (triangular) distribution
- Skewness in a discrete distribution (counterpoint to above)
mode, mean, median of discrete (Poisson) distribution
- Measures of income spread
absolute and percentage change; range, s.d. and variance
- The power of compound interest
logarithmic axis
- Logarithmic axes and income
measures of spread; absolute change versus percentage change
- Arithmetic versus geometric mean
probability; expected return; geometric mean as long-term expected return
- The shape of the sampling distribution
sampling from a skewed distribution; distinguishing the population, sample and sampling distribution
- Distribution of sample standard deviations and why we use n-1 to calculate sample sd (incomplete)
sampling; Bessel's correction
- Correlation of a sample (incomplete)
University of Sussex
Interactive Excel spreadsheets
External links
Richard Field, John Horton, Sue Cobb, Sandra Hill, University of Nottingham
Statistics - An Intuitive Introduction
An interactive tutorial combining graphs, text and interactive features. Twenty-five units cover topics from rounding and central tendency up to regression lines and Chi squared tests
Licence: Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales
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