These are archived statistics for NACHI's Online Inspector Examination version 4.0. These statistics apply from the exam's introduction through 6/2/2004 at 6 PM Eastern Standard Time.
| Total Number of Exams Taken: | 23671 (100%) |
| Total Number of Exams Passed: | 12071 (50.99) |
| Total Number of Exams Failed: | 11600 (49.01) |
| Exams Being Taken Right Now: | 2 |
| Required Passing Grade: | 75 |
| Average Grade: | 64.12 |
| Average Passing Grade: | 84.11 |
| Average Failing Grade: | 43.99 |