condition mean min max ZT0-3 617.75 617.75 617.75 ZT4-7 419.3 419.3 419.3 ZT8-11 485.15 485.15 485.15 ZT12-15 520.65 520.65 520.65 ZT16-19 483.45000000000005 483.45000000000005 483.45000000000005 ZT20-23 375.15 375.15 375.15