condition mean min max ZT0-3 109.494061 109.494061 109.494061 ZT4-7 131.9964415 131.9964415 131.9964415 ZT8-11 140.1398415 140.1398415 140.1398415 ZT12-15 130.2390965 130.2390965 130.2390965 ZT16-19 155.1286515 155.1286515 155.1286515 ZT20-23 150.710992 150.710992 150.710992