condition mean min max ZT0-3 0.0224724 0.0224724 0.0224724 ZT4-7 0.022064399999999998 0.022064399999999998 0.022064399999999998 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0069023999999999995 0.0069023999999999995 0.0069023999999999995 ZT20-23 0.0 0.0 0.0