condition mean min max ZT0-3 58.94425 58.94425 58.94425 ZT4-7 76.0244 76.0244 76.0244 ZT8-11 35.01845 35.01845 35.01845 ZT12-15 25.9409 25.9409 25.9409 ZT16-19 31.182450000000003 31.182450000000003 31.182450000000003 ZT20-23 41.21295 41.21295 41.21295