condition mean min max ZT0-3 56.2644 56.2644 56.2644 ZT4-7 48.78205 48.78205 48.78205 ZT8-11 54.421850000000006 54.421850000000006 54.421850000000006 ZT12-15 64.2658 64.2658 64.2658 ZT16-19 69.476 69.476 69.476 ZT20-23 74.9484 74.9484 74.9484