condition mean min max ZT0-3 1.0257077055 0.967502187 1.083913224 ZT4-7 1.5772327845 1.3092965455 1.8451690235 ZT8-11 2.410337396 2.032019165 2.788655627 ZT12-15 3.3161226815000004 2.685801406 3.9464439570000005 ZT16-19 2.8363697615000003 2.5054506494999997 3.1672888735000004 ZT20-23 5.879514315750001 4.9077520305 6.851276601