condition mean min max ZT0-3 187.35 187.35 187.35 ZT4-7 315.9 315.9 315.9 ZT8-11 292.0 292.0 292.0 ZT12-15 199.9 199.9 199.9 ZT16-19 160.9 160.9 160.9 ZT20-23 155.55 155.55 155.55