condition mean min max ZT0-3 0.0350162 0.01740415 0.05262825 ZT4-7 0.034886600000000004 0.034886600000000004 0.034886600000000004 ZT8-11 0.034852049999999996 0.034852049999999996 0.034852049999999996 ZT12-15 0 0 0 ZT16-19 0.01718605 0.01718605 0.01718605 ZT20-23 0.06952130000000001 0.06952130000000001 0.06952130000000001