Basic statistical tests
Framing
- Descriptive statistics (mean, standard deviation, standard error of the mean, interquartile range) summarise a dataset's central tendency and spread, with the choice between parametric (mean/SD-based) and non-parametric (median/IQR-based) summary measures and tests depending on whether the underlying data follows a normal distribution
- Correctly identifying data distribution shape is the first step before selecting appropriate summary measures or subsequent statistical tests, since applying parametric methods to non-normally distributed data can produce misleading results
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