condition mean min max ZT0-3 301.5 301.5 301.5 ZT4-7 213.0 213.0 213.0 ZT8-11 145.55 145.55 145.55 ZT12-15 280.25 280.25 280.25 ZT16-19 372.3 372.3 372.3 ZT20-23 383.25 383.25 383.25