condition mean min max ZT0-3 299.5 299.5 299.5 ZT4-7 678.3 678.3 678.3 ZT8-11 707.3 707.3 707.3 ZT12-15 763.8 763.8 763.8 ZT16-19 507.2 507.2 507.2 ZT20-23 455.6 455.6 455.6