condition mean min max ZT0-3 356.479562 356.479562 356.479562 ZT4-7 770.665302 770.665302 770.665302 ZT8-11 801.6342985 801.6342985 801.6342985 ZT12-15 616.621016 616.621016 616.621016 ZT16-19 520.529992 520.529992 520.529992 ZT20-23 553.7829065 553.7829065 553.7829065