condition mean min max ZT0-3 265.95 265.95 265.95 ZT4-7 166.5 166.5 166.5 ZT8-11 132.55 132.55 132.55 ZT12-15 156.2 156.2 156.2 ZT16-19 271.65 271.65 271.65 ZT20-23 363.6 363.6 363.6