I guess yield rate is REAL data, but cross-adm rate

來源: run2022 2023-10-31 06:47:33 [] [舊帖] [給我悄悄話] 本文已被閱讀: 次 (122 bytes)

is a kind of "soft" data which is from survay. The sample is so small and can easily triger bias. 

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