condition mean min max ZT0-3 4.37336 4.0395900000000005 4.707129999999999 ZT4-7 3.32181 3.32181 3.32181 ZT8-11 3.2722300000000004 3.2722300000000004 3.2722300000000004 ZT12-15 0 0 0 ZT16-19 4.62641 4.62641 4.62641 ZT20-23 4.45903 4.45903 4.45903