condition mean min max ZT0-3 1.2195087500000001 1.21066 1.2283575 ZT4-7 1.2556150000000001 1.2556150000000001 1.2556150000000001 ZT8-11 1.645405 1.645405 1.645405 ZT12-15 0 0 0 ZT16-19 1.80626 1.80626 1.80626 ZT20-23 2.0831 2.0831 2.0831