condition mean min max ZT0-3 0.46455100000000005 0.310347 0.618755 ZT4-7 0.3054405 0.3054405 0.3054405 ZT8-11 1.243695 1.243695 1.243695 ZT12-15 0 0 0 ZT16-19 0.9151775 0.9151775 0.9151775 ZT20-23 0.920469 0.920469 0.920469