condition mean min max ZT0-3 9.08174 9.08174 9.08174 ZT4-7 10.16503 10.16503 10.16503 ZT8-11 2.97103 2.97103 2.97103 ZT12-15 4.38422 4.38422 4.38422 ZT16-19 4.08691 4.08691 4.08691 ZT20-23 8.123054999999999 8.123054999999999 8.123054999999999