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Comparison of monthly productivity following H&E workcell process change
| Month | Pre-change productivity (2007-8) | Post-change productivity (2008-9) |
|---|---|---|
| November | 2515 | 2593 |
| December | 2374 | 2598 |
| January | 2041 | 2259 |
| February | 2404 | 2575 |
| March | 2209 | 2534 |
| Mean (SD) | 2309 (185)* | 2512 (143)* |
* t < 0.0005 (two-tail test)
