condition mean min max ZT0-3 54.472449 54.472449 54.472449 ZT4-7 369.8057675 369.8057675 369.8057675 ZT8-11 346.41190600000004 346.41190600000004 346.41190600000004 ZT12-15 327.19048999999995 327.19048999999995 327.19048999999995 ZT16-19 171.99286949999998 171.99286949999998 171.99286949999998 ZT20-23 181.97087299999998 181.97087299999998 181.97087299999998