condition mean min max ZT0-3 0.41654978349999994 0.360296164 0.47280340299999996 ZT4-7 0.51662675875 0.433554219 0.5996992985 ZT8-11 0.6310753555 0.6259834265 0.6361672845 ZT12-15 0.27488559875 0.1360967865 0.413674411 ZT16-19 0.44430204300000004 0.37463980350000003 0.5139642825 ZT20-23 0.59914536925 0.4698882035 0.728402535