condition mean min max ZT0-3 75.1039 75.1039 75.1039 ZT4-7 56.96575 56.96575 56.96575 ZT8-11 46.8665 46.8665 46.8665 ZT12-15 79.45949999999999 79.45949999999999 79.45949999999999 ZT16-19 139.22133333333335 139.22133333333335 139.22133333333335 ZT20-23 191.373 191.373 191.373