condition mean min max ZT0-3 328.7265 328.7265 328.7265 ZT4-7 301.6245 301.6245 301.6245 ZT8-11 269.78549999999996 269.78549999999996 269.78549999999996 ZT12-15 265.6875 265.6875 265.6875 ZT16-19 281.2705 281.2705 281.2705 ZT20-23 341.2205 341.2205 341.2205