condition mean min max ZT0-3 0.21173510375000001 0.15242553250000002 0.271044675 ZT4-7 0.02248814575 0.0137226125 0.031253679 ZT8-11 0.42360861000000005 0.1915694315 0.6556477885 ZT12-15 0.766668504 0.75263137 0.7807056379999999 ZT16-19 0.47887157975 0.394872396 0.5628707635 ZT20-23 0.65728454 0.620316113 0.6942529669999999