condition mean min max ZT0-3 0.545588 0.545588 0.545588 ZT4-7 0.36573449999999996 0.36573449999999996 0.36573449999999996 ZT8-11 0.472052 0.472052 0.472052 ZT12-15 0.579562 0.579562 0.579562 ZT16-19 0.8775010000000001 0.8775010000000001 0.8775010000000001 ZT20-23 0.704636 0.704636 0.704636