condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0252287 0.0252287 0.0252287 ZT8-11 0.075947 0.075947 0.075947 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0