condition mean min max ZT0-3 5.391422499999999 4.27124 6.511604999999999 ZT4-7 5.599295 5.599295 5.599295 ZT8-11 6.3528199999999995 6.3528199999999995 6.3528199999999995 ZT12-15 0 0 0 ZT16-19 6.46742 6.46742 6.46742 ZT20-23 5.90442 5.90442 5.90442