condition mean min max ZT0-3 134.431533 134.431533 134.431533 ZT4-7 133.852057 133.852057 133.852057 ZT8-11 128.6166725 128.6166725 128.6166725 ZT12-15 121.9093125 121.9093125 121.9093125 ZT16-19 148.603255 148.603255 148.603255 ZT20-23 107.09458950000001 107.09458950000001 107.09458950000001