condition mean min max ZT0-3 10.669935 10.669935 10.669935 ZT4-7 10.379468 10.379468 10.379468 ZT8-11 10.690733 10.690733 10.690733 ZT12-15 10.594159000000001 10.594159000000001 10.594159000000001 ZT16-19 8.886334 8.886334 8.886334 ZT20-23 9.467788500000001 9.467788500000001 9.467788500000001