condition mean min max ZT0-3 32.1314 26.4098 37.852999999999994 ZT4-7 52.1513 52.1513 52.1513 ZT8-11 33.15225 33.15225 33.15225 ZT12-15 0 0 0 ZT16-19 43.81705 43.81705 43.81705 ZT20-23 46.80035 46.80035 46.80035