condition mean min max ZT0-3 51.923348 51.923348 51.923348 ZT4-7 60.9641015 60.9641015 60.9641015 ZT8-11 57.9317225 57.9317225 57.9317225 ZT12-15 48.557148999999995 48.557148999999995 48.557148999999995 ZT16-19 65.479143 65.479143 65.479143 ZT20-23 78.7656685 78.7656685 78.7656685