condition mean min max ZT0-3 11.258962499999999 11.059474999999999 11.45845 ZT4-7 11.5603 11.5603 11.5603 ZT8-11 10.747485000000001 10.747485000000001 10.747485000000001 ZT12-15 0 0 0 ZT16-19 7.94229 7.94229 7.94229 ZT20-23 7.4086549999999995 7.4086549999999995 7.4086549999999995