condition mean min max ZT0-3 102.257675 95.09285 109.4225 ZT4-7 70.1631 70.1631 70.1631 ZT8-11 87.1901 87.1901 87.1901 ZT12-15 0 0 0 ZT16-19 121.69049999999999 121.69049999999999 121.69049999999999 ZT20-23 86.4064 86.4064 86.4064