condition mean min max ZT0-3 93.65712500000001 89.8906 97.42365000000001 ZT4-7 89.42695 89.42695 89.42695 ZT8-11 184.638 184.638 184.638 ZT12-15 0 0 0 ZT16-19 231.946 231.946 231.946 ZT20-23 149.164 149.164 149.164