condition mean min max ZT0-3 32.653 32.653 32.653 ZT4-7 36.49705 36.49705 36.49705 ZT8-11 33.48605 33.48605 33.48605 ZT12-15 23.607950000000002 23.607950000000002 23.607950000000002 ZT16-19 24.452199999999998 24.452199999999998 24.452199999999998 ZT20-23 24.559649999999998 24.559649999999998 24.559649999999998