condition mean min max ZT0-3 25.12175 14.400400000000001 35.8431 ZT4-7 1025.4769999999999 1025.4769999999999 1025.4769999999999 ZT8-11 524.9870000000001 524.9870000000001 524.9870000000001 ZT12-15 0 0 0 ZT16-19 130.7805 130.7805 130.7805 ZT20-23 207.3405 207.3405 207.3405