Compare observations from different distributions using z-scores
The data record volumes recovered by several treatment runs. A higher observed result is preferred
Each row gives an observed value, the mean and the standard deviation for one group. Complete the standard-score column before making the comparison
| Group | Observed value (L) | Mean (L) | Standard deviation (L) | Standard score |
|---|---|---|---|---|
| Reading D | 77 | 71 | 6 | ? |
| Reading C | 79 | 83 | 4 | ? |