condition mean min max ZT0-3 5.373362500000001 5.287045 5.4596800000000005 ZT4-7 5.48358 5.48358 5.48358 ZT8-11 4.8889 4.8889 4.8889 ZT12-15 0 0 0 ZT16-19 6.33808 6.33808 6.33808 ZT20-23 5.43203 5.43203 5.43203