condition mean min max ZT0-3 144.14999999999998 144.14999999999998 144.14999999999998 ZT4-7 168.7 168.7 168.7 ZT8-11 160.60000000000002 160.60000000000002 160.60000000000002 ZT12-15 166.5 166.5 166.5 ZT16-19 148.5 148.5 148.5 ZT20-23 160.4 160.4 160.4