condition mean min max ZT0-3 0.58655147675 0.4409423185 0.732160635 ZT4-7 1.39404235075 0.7885502535 1.9995344480000001 ZT8-11 5.1628322575 4.068084948 6.2575795670000005 ZT12-15 9.7471747905 9.4747314825 10.0196180985 ZT16-19 6.7132507225 6.518421672500001 6.9080797725 ZT20-23 6.395697895500001 6.3064776385000005 6.484918152500001