condition mean min max ZT0-3 5.649615000000001 5.649615000000001 5.649615000000001 ZT4-7 5.363355 5.363355 5.363355 ZT8-11 8.761915 8.761915 8.761915 ZT12-15 0.0 0.0 0.0 ZT16-19 1.554245 1.554245 1.554245 ZT20-23 5.42469 5.42469 5.42469