condition mean min max ZT0-3 476.588769 476.588769 476.588769 ZT4-7 396.1018155 396.1018155 396.1018155 ZT8-11 343.2885305 343.2885305 343.2885305 ZT12-15 352.59128 352.59128 352.59128 ZT16-19 341.77209949999997 341.77209949999997 341.77209949999997 ZT20-23 389.8593725 389.8593725 389.8593725