MedCalcNotation and symbols
| ∑ | Greek letter sigma, denoting sum of. ∑x is shorthand for $ \sum_{i=1}^{n}{x_i} $ |
| | x | | absolute value of x |
| α | probability of a Type I error; or level of hypothesis test, usually 0.05 |
| β | probability of a Type II error |
| χ2 | value from the Chi-squared distribution, see Chi-squared table |
| CI | confidence interval |
| CR | coefficient of repeatability |
| DF | degrees of freedom |
| F | value from the F-distribution, see F-Distribution critical values table |
| K | kappa |
| n or N | sample size |
| P | probability of hypothesis |
| r | Pearson correlation coefficient |
| rs | Spearman rank correlation coefficient |
| R2 | coefficient of determination |
| RSD | relative standard deviation |
| s | standard deviation |
| s2 | variance |
| SD | standard deviation |
| SEM | standard error of the mean |
| t | value from the t-distribution, see t-distribution table |
| z | value from the Normal distribution, see Normal distribution table |
Digimizer