condition mean min max ZT0-3 64.47425 61.53529999999999 67.4132 ZT4-7 113.64750000000001 113.64750000000001 113.64750000000001 ZT8-11 246.0625 246.0625 246.0625 ZT12-15 0 0 0 ZT16-19 181.106 181.106 181.106 ZT20-23 121.98949999999999 121.98949999999999 121.98949999999999