condition mean min max ZT0-3 10.321603333333334 8.70916 12.38035 ZT4-7 8.194115 8.194115 8.194115 ZT8-11 3.81806 3.81806 3.81806 ZT12-15 10.5058375 5.389975 15.6217 ZT16-19 13.982 13.982 13.982 ZT20-23 12.3589 12.3589 12.3589