condition mean min max ZT0-3 0.46328898074999997 0.42764009299999994 0.4989378685 ZT4-7 1.77107357025 0.27306058 3.2690865605 ZT8-11 17.57810808975 12.8644164995 22.291799679999997 ZT12-15 23.683189515000002 22.423045755 24.943333275 ZT16-19 12.44861951075 12.2695883115 12.627650710000001 ZT20-23 10.247347233 8.957416476 11.53727799