condition mean min max ZT0-3 6.55566 6.41525 6.69607 ZT4-7 3.803955 3.803955 3.803955 ZT8-11 2.9765499999999996 2.9765499999999996 2.9765499999999996 ZT12-15 0 0 0 ZT16-19 5.0080100000000005 5.0080100000000005 5.0080100000000005 ZT20-23 4.794499999999999 4.794499999999999 4.794499999999999