condition mean min max ZT0-3 10.54196 10.54196 10.54196 ZT4-7 11.20049 11.20049 11.20049 ZT8-11 11.556470000000001 11.556470000000001 11.556470000000001 ZT12-15 11.58575 11.58575 11.58575 ZT16-19 11.20195 11.20195 11.20195 ZT20-23 10.98433 10.98433 10.98433