condition mean min max ZT0-3 534.717 534.717 534.717 ZT4-7 569.7764999999999 569.7764999999999 569.7764999999999 ZT8-11 589.78 589.78 589.78 ZT12-15 549.031 549.031 549.031 ZT16-19 393.4315 393.4315 393.4315 ZT20-23 483.29449999999997 483.29449999999997 483.29449999999997