condition mean min max ZT0-3 38.26025 23.14225 64.6674 ZT4-7 73.56264999999999 73.56264999999999 73.56264999999999 ZT8-11 64.75335 64.75335 64.75335 ZT12-15 88.62725 88.26675 88.98775 ZT16-19 57.100350000000006 57.100350000000006 57.100350000000006 ZT20-23 36.0785 36.0785 36.0785