condition mean min max ZT0-3 533.0 533.0 533.0 ZT4-7 402.9 402.9 402.9 ZT8-11 485.45 485.45 485.45 ZT12-15 539.2 539.2 539.2 ZT16-19 538.4 538.4 538.4 ZT20-23 544.95 544.95 544.95