condition mean min max ZT0-3 85.053682 85.053682 85.053682 ZT4-7 94.87824850000001 94.87824850000001 94.87824850000001 ZT8-11 77.926231 77.926231 77.926231 ZT12-15 84.57692399999999 84.57692399999999 84.57692399999999 ZT16-19 58.276503500000004 58.276503500000004 58.276503500000004 ZT20-23 58.05116100000001 58.05116100000001 58.05116100000001