condition mean min max ZT0-3 115.578656 115.578656 115.578656 ZT4-7 51.593571499999996 51.593571499999996 51.593571499999996 ZT8-11 69.2181875 69.2181875 69.2181875 ZT12-15 103.49252 103.49252 103.49252 ZT16-19 117.568288 117.568288 117.568288 ZT20-23 84.33024499999999 84.33024499999999 84.33024499999999