condition mean min max ZT0-3 10.584900000000001 10.584900000000001 10.584900000000001 ZT4-7 7.838035 7.838035 7.838035 ZT8-11 7.889060000000001 7.889060000000001 7.889060000000001 ZT12-15 8.43206 8.43206 8.43206 ZT16-19 10.444385 10.444385 10.444385 ZT20-23 10.445599999999999 10.445599999999999 10.445599999999999