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List of Statistical Symbols
| F | Fisher’s F ratio |
| Gy | Gray—unit of absorbed radiation |
| M | mean (arithmetic average) |
| n | number in a subsample |
| N | total number in a sample |
| p | probability; additionally, the success probability of a binomial variable |
| r | Pearson product–moment correlation |
| SD | standard deviation |
| Χ2 | computed value of a chisquare test |
| z | a standard score; the difference between one value in a distribution and the mean of the distribution divided by the SD |