condition mean min max ZT0-3 0.80816775 0.6303025 0.986033 ZT4-7 1.836135 1.836135 1.836135 ZT8-11 1.1165605 1.1165605 1.1165605 ZT12-15 0 0 0 ZT16-19 2.1118 2.1118 2.1118 ZT20-23 1.64269 1.64269 1.64269