condition mean min max ZT0-3 19.32595 19.03895 19.612949999999998 ZT4-7 14.46145 14.46145 14.46145 ZT8-11 10.239149999999999 10.239149999999999 10.239149999999999 ZT12-15 0 0 0 ZT16-19 13.618509999999999 13.618509999999999 13.618509999999999 ZT20-23 17.07065 17.07065 17.07065