condition mean min max ZT0-3 1.4372610555 1.117837396 1.756684715 ZT4-7 1.4579998635 1.0924347245 1.8235650025 ZT8-11 0.8903243300000001 0.7488435615000001 1.0318050985 ZT12-15 1.66392753 1.267191768 2.060663292 ZT16-19 0.80952214975 0.7869131055 0.832131194 ZT20-23 1.13113554125 0.6187957995 1.643475283