condition mean min max ZT0-3 260.85 260.85 260.85 ZT4-7 372.3 372.3 372.3 ZT8-11 380.75 380.75 380.75 ZT12-15 389.2 389.2 389.2 ZT16-19 331.0 331.0 331.0 ZT20-23 486.6 486.6 486.6