condition mean min max ZT0-3 592.2 592.2 592.2 ZT4-7 473.1 473.1 473.1 ZT8-11 453.75 453.75 453.75 ZT12-15 406.75 406.75 406.75 ZT16-19 509.29999999999995 509.29999999999995 509.29999999999995 ZT20-23 632.7 632.7 632.7