condition mean min max ZT0-3 9.00023 9.00023 9.00023 ZT4-7 10.5865815 10.5865815 10.5865815 ZT8-11 9.9347715 9.9347715 9.9347715 ZT12-15 9.871688 9.871688 9.871688 ZT16-19 10.0625655 10.0625655 10.0625655 ZT20-23 9.981669 9.981669 9.981669