condition mean min max ZT0-3 4.28221 3.6840200000000003 4.8804 ZT4-7 1.9546350000000001 1.9546350000000001 1.9546350000000001 ZT8-11 2.0566355 2.0566355 2.0566355 ZT12-15 0 0 0 ZT16-19 6.57421 6.57421 6.57421 ZT20-23 7.089565 7.089565 7.089565