condition mean min max ZT0-3 0.8523913333333334 0.7508105 0.981088 ZT4-7 0.4418745 0.4418745 0.4418745 ZT8-11 0.2337165 0.2337165 0.2337165 ZT12-15 0.43511 0.39815100000000003 0.472069 ZT16-19 0.5755895 0.5755895 0.5755895 ZT20-23 0.8778779999999999 0.8778779999999999 0.8778779999999999