condition mean min max ZT0-3 6.852423790083334 6.4993154855 7.205532094666666 ZT4-7 10.8566074105 10.213109402666667 11.500105418333334 ZT8-11 11.272533318666667 10.814075813333334 11.730990824000001 ZT12-15 9.326492235 9.005727349 9.647257121 ZT16-19 7.6228831894999995 6.348478147 8.897288232 ZT20-23 6.542482479666667 6.393138775333333 6.691826184