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Question: when the tratio statistics on individual coefficients are all near...

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When the t-ratio statistics on individual coefficients are all near 0 but the F-test statistic is greater than 20

multicollinearity is suggested.

nonconstant variance of the error terms is suggested.

serial correlation is suggested.

the root-mean-squared error will be large.

the Durbin-Watson statistic will be near 0.

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