condition mean min max ZT0-3 25.277832 25.277832 25.277832 ZT4-7 14.185651499999999 14.185651499999999 14.185651499999999 ZT8-11 12.806465500000002 12.806465500000002 12.806465500000002 ZT12-15 14.212340999999999 14.212340999999999 14.212340999999999 ZT16-19 15.4412655 15.4412655 15.4412655 ZT20-23 17.2197025 17.2197025 17.2197025