condition mean min max ZT0-3 0.43127721550000003 0.185809898 0.676744533 ZT4-7 1.213140864 0.7056241365000001 1.7206575915000002 ZT8-11 2.74559614025 1.825913798 3.6652784824999998 ZT12-15 7.207951361999999 6.9389470135 7.4769557104999995 ZT16-19 5.95200968175 5.3693054885 6.534713875 ZT20-23 1.2654089877499999 0.6777103375 1.853107638