condition mean min max ZT0-3 106.42117499999999 106.42117499999999 106.42117499999999 ZT4-7 161.759275 161.759275 161.759275 ZT8-11 145.06381666666667 145.06381666666667 145.06381666666667 ZT12-15 103.1643 103.1643 103.1643 ZT16-19 90.0981425 90.0981425 90.0981425 ZT20-23 76.947925 76.947925 76.947925