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Rescaling Approach Using the Z Score
| Observed | Improvement | New % | |||
|---|---|---|---|---|---|
| Process | Mean (SD) | % Adherence | Z Score | (Z Scale) | Adherence |
| 1 | 70% (8%) | 86 | (86 − 70)/8 = 2 | 1a | 94 |
| 2 | 60% (16%) | 76 | (76 − 60)/16 = 1 | 1b | 92 |
| Composite score | (2 + 1)/2 = 1.5 | a: (3 + 1)/2 = 2 | |||
| b: (2 + 2)/2 = 2 |
In this table, z score = (observed value – mean)/standard deviation (SD).
