condition mean min max ZT0-3 78.217192 78.217192 78.217192 ZT4-7 89.3798945 89.3798945 89.3798945 ZT8-11 103.05222499999999 103.05222499999999 103.05222499999999 ZT12-15 114.23842 114.23842 114.23842 ZT16-19 115.486457 115.486457 115.486457 ZT20-23 114.5627975 114.5627975 114.5627975