condition mean min max ZT0-3 1.742095 1.742095 1.742095 ZT4-7 1.7829899999999999 1.7829899999999999 1.7829899999999999 ZT8-11 1.57643 1.57643 1.57643 ZT12-15 1.9358849999999999 1.9358849999999999 1.9358849999999999 ZT16-19 1.43117 1.43117 1.43117 ZT20-23 2.004355 2.004355 2.004355