condition mean min max ZT0-3 538.097304 538.097304 538.097304 ZT4-7 653.1484175 653.1484175 653.1484175 ZT8-11 802.1484029999999 802.1484029999999 802.1484029999999 ZT12-15 783.2655775000001 783.2655775000001 783.2655775000001 ZT16-19 606.929585 606.929585 606.929585 ZT20-23 463.574688 463.574688 463.574688