condition mean min max ZT0-3 10.030027500000001 9.679455 10.380600000000001 ZT4-7 7.798955 7.798955 7.798955 ZT8-11 7.505240000000001 7.505240000000001 7.505240000000001 ZT12-15 0 0 0 ZT16-19 9.346725 9.346725 9.346725 ZT20-23 10.863199999999999 10.863199999999999 10.863199999999999