condition mean min max ZT0-3 607.0999999999999 607.0999999999999 607.0999999999999 ZT4-7 634.1 634.1 634.1 ZT8-11 473.75 473.75 473.75 ZT12-15 599.45 599.45 599.45 ZT16-19 605.8 605.8 605.8 ZT20-23 666.55 666.55 666.55