condition mean min max ZT0-3 31.15175 25.06465 37.23885 ZT4-7 41.4857 41.4857 41.4857 ZT8-11 94.8082 94.8082 94.8082 ZT12-15 0 0 0 ZT16-19 102.33295 102.33295 102.33295 ZT20-23 66.55584999999999 66.55584999999999 66.55584999999999