condition mean min max ZT0-3 65.25 65.25 65.25 ZT4-7 71.1 71.1 71.1 ZT8-11 58.45 58.45 58.45 ZT12-15 97.8 97.8 97.8 ZT16-19 94.25 94.25 94.25 ZT20-23 116.15 116.15 116.15