condition mean min max ZT0-3 659.4000000000001 659.4000000000001 659.4000000000001 ZT4-7 358.1 358.1 358.1 ZT8-11 378.7 378.7 378.7 ZT12-15 453.95000000000005 453.95000000000005 453.95000000000005 ZT16-19 614.2 614.2 614.2 ZT20-23 689.05 689.05 689.05