condition mean min max ZT0-3 1.4558 1.37537 1.53623 ZT4-7 2.409475 2.409475 2.409475 ZT8-11 2.8495100000000004 2.8495100000000004 2.8495100000000004 ZT12-15 0 0 0 ZT16-19 2.470955 2.470955 2.470955 ZT20-23 1.743655 1.743655 1.743655