condition mean min max ZT0-3 7445.75 7445.75 7445.75 ZT4-7 6415.5 6415.5 6415.5 ZT8-11 6688.6 6688.6 6688.6 ZT12-15 7523.1 7523.1 7523.1 ZT16-19 7526.5 7526.5 7526.5 ZT20-23 7257.15 7257.15 7257.15