condition mean min max ZT0-3 0.32533650000000003 0.32533650000000003 0.32533650000000003 ZT4-7 0.2688335 0.2688335 0.2688335 ZT8-11 0.1248765 0.1248765 0.1248765 ZT12-15 0.03812845 0.03812845 0.03812845 ZT16-19 0.604206 0.604206 0.604206 ZT20-23 0.33254249999999996 0.33254249999999996 0.33254249999999996