condition mean min max ZT0-3 6.8210425 6.48827 7.153815 ZT4-7 8.224364999999999 8.224364999999999 8.224364999999999 ZT8-11 11.285250000000001 11.285250000000001 11.285250000000001 ZT12-15 0 0 0 ZT16-19 10.144079999999999 10.144079999999999 10.144079999999999 ZT20-23 10.243020000000001 10.243020000000001 10.243020000000001