condition mean min max ZT0-3 0.0315037 0.0315037 0.0315037 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.02877475 0.02877475 0.02877475 ZT16-19 0.07639119999999999 0.07639119999999999 0.07639119999999999 ZT20-23 0.056843149999999995 0.056843149999999995 0.056843149999999995