condition mean min max ZT0-3 0.42552483333333335 0.135147 0.837967 ZT4-7 0.26495 0.26495 0.26495 ZT8-11 0.974877 0.974877 0.974877 ZT12-15 0.79914875 0.3025475 1.29575 ZT16-19 0.4662145 0.4662145 0.4662145 ZT20-23 0.0 0.0 0.0