condition mean min max ZT0-3 329.2 329.2 329.2 ZT4-7 472.8 472.8 472.8 ZT8-11 715.3 715.3 715.3 ZT12-15 457.95 457.95 457.95 ZT16-19 232.29999999999998 232.29999999999998 232.29999999999998 ZT20-23 160.9 160.9 160.9