condition mean min max ZT0-3 2451.01009 2451.01009 2451.01009 ZT4-7 2025.251085 2025.251085 2025.251085 ZT8-11 1920.6171545 1920.6171545 1920.6171545 ZT12-15 1813.276487 1813.276487 1813.276487 ZT16-19 1722.631807 1722.631807 1722.631807 ZT20-23 1446.131212 1446.131212 1446.131212