condition mean min max ZT0-3 147.2535 147.2535 147.2535 ZT4-7 107.39225 107.39225 107.39225 ZT8-11 141.0685 141.0685 141.0685 ZT12-15 131.332 131.332 131.332 ZT16-19 159.89249999999998 159.89249999999998 159.89249999999998 ZT20-23 159.7955 159.7955 159.7955