condition mean min max ZT0-3 31.856033333333333 26.0929 39.81205 ZT4-7 25.3788 25.3788 25.3788 ZT8-11 31.13565 31.13565 31.13565 ZT12-15 44.598275 40.94315 48.2534 ZT16-19 39.623099999999994 39.623099999999994 39.623099999999994 ZT20-23 41.134150000000005 41.134150000000005 41.134150000000005