condition mean min max ZT0-3 134.301185 134.301185 134.301185 ZT4-7 88.63037750000001 88.63037750000001 88.63037750000001 ZT8-11 139.9358985 139.9358985 139.9358985 ZT12-15 128.030492 128.030492 128.030492 ZT16-19 186.9651685 186.9651685 186.9651685 ZT20-23 155.3872235 155.3872235 155.3872235