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For the power-company study we described above, when we recalculated the scores after adding some missed correct answers, our results changed substantially (although they were still lower than we would have liked):
| Existing tree | New tree 1 | New tree 2 | |
|---|---|---|---|
| Original score | 36% | 40% | 35% |
| Corrected score | 46% | 43% | 47% |
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