condition mean min max ZT0-3 28.2408 28.2408 28.2408 ZT4-7 23.21525 23.21525 23.21525 ZT8-11 19.234949999999998 19.234949999999998 19.234949999999998 ZT12-15 20.33735 20.33735 20.33735 ZT16-19 22.92935 22.92935 22.92935 ZT20-23 26.81495 26.81495 26.81495