condition mean min max ZT0-3 33.3633 30.7998 35.9268 ZT4-7 23.2611 23.2611 23.2611 ZT8-11 28.56505 28.56505 28.56505 ZT12-15 0 0 0 ZT16-19 54.7187 54.7187 54.7187 ZT20-23 33.6178 33.6178 33.6178