condition mean min max ZT0-3 1829.75 1829.75 1829.75 ZT4-7 1129.3 1129.3 1129.3 ZT8-11 1103.2 1103.2 1103.2 ZT12-15 1023.6999999999999 1023.6999999999999 1023.6999999999999 ZT16-19 1420.25 1420.25 1420.25 ZT20-23 1662.4 1662.4 1662.4