condition mean min max ZT0-3 12.427724999999999 11.899899999999999 12.955549999999999 ZT4-7 14.469999999999999 14.469999999999999 14.469999999999999 ZT8-11 16.48605 16.48605 16.48605 ZT12-15 0 0 0 ZT16-19 17.16815 17.16815 17.16815 ZT20-23 15.321950000000001 15.321950000000001 15.321950000000001