condition mean min max ZT0-3 0.440621426 0.24169182100000003 0.639551031 ZT4-7 0.8178385725 0.280947324 1.354729821 ZT8-11 3.0356497135000002 1.51294369 4.558355737 ZT12-15 5.35474973725 4.783354118 5.9261453565 ZT16-19 5.337985353500001 4.6491791455 6.0267915615000005 ZT20-23 3.2067463952499997 2.338585195 4.0749075955