condition mean min max ZT0-3 0.1417205 0.1063235 0.21161 ZT4-7 0.3905455 0.3905455 0.3905455 ZT8-11 0.30820749999999997 0.30820749999999997 0.30820749999999997 ZT12-15 0.05574575 0.0 0.1114915 ZT16-19 0.195089 0.195089 0.195089 ZT20-23 0.33210649999999997 0.33210649999999997 0.33210649999999997