condition mean min max ZT0-3 855.75 855.75 855.75 ZT4-7 1099.1 1099.1 1099.1 ZT8-11 1132.1 1132.1 1132.1 ZT12-15 1169.5500000000002 1169.5500000000002 1169.5500000000002 ZT16-19 945.7 945.7 945.7 ZT20-23 900.45 900.45 900.45