condition mean min max ZT0-3 902.6145 902.6145 902.6145 ZT4-7 1044.990169 1044.990169 1044.990169 ZT8-11 985.9272475 985.9272475 985.9272475 ZT12-15 1099.1830439999999 1099.1830439999999 1099.1830439999999 ZT16-19 1139.0139405 1139.0139405 1139.0139405 ZT20-23 1149.4743755 1149.4743755 1149.4743755