condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.013206262250000001 0.0 0.026412524500000003 ZT8-11 0.0075811925 0.0 0.015162385 ZT12-15 0.017636897 0.0141589315 0.0211148625 ZT16-19 0.0091279475 0.0 0.018255895 ZT20-23 0.01581794225 0.0 0.0316358845