condition mean min max ZT0-3 1.266605 1.266605 1.266605 ZT4-7 2.29941 2.29941 2.29941 ZT8-11 2.3052900000000003 2.3052900000000003 2.3052900000000003 ZT12-15 0.5253225 0.5253225 0.5253225 ZT16-19 0.975994 0.975994 0.975994 ZT20-23 0.8676415 0.8676415 0.8676415