condition mean min max ZT0-3 11.090642500000001 9.852685000000001 12.3286 ZT4-7 15.9664 15.9664 15.9664 ZT8-11 8.984110000000001 8.984110000000001 8.984110000000001 ZT12-15 0 0 0 ZT16-19 12.181365 12.181365 12.181365 ZT20-23 13.276150000000001 13.276150000000001 13.276150000000001