condition mean min max ZT0-3 1.80213 1.80213 1.80213 ZT4-7 1.1136545 1.1136545 1.1136545 ZT8-11 0.6141515 0.6141515 0.6141515 ZT12-15 1.009741 1.009741 1.009741 ZT16-19 1.497535 1.497535 1.497535 ZT20-23 1.1562565 1.1562565 1.1562565