If the hypothesis,H_o: $\beta$₁= 0 is rejected,then the sample regression coefficeint b₁,indicates the change in the predicted value for a unit change in X₁ when all other X_i variables are held constant.

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This statement is true. The sample regression coefficient b₁ represents the change in the predicted value of the response variable Y for a unit change in the predictor variable X₁, holding all other predictor variables constant. If the null hypothesis is rejected, it means that there is a significant relationship between X₁ and Y, and the value of b₁ can be interpreted as the amount by which Y is predicted to change for a one-unit increase in X₁.

If the Hypothesis,Ho β\betaβ 1= 0 Is Rejected,then the Sample Regression Coefficeint B1,indicates the Regression

If the Hypothesis,H_o $\beta$ ₁= 0 Is Rejected,then the Sample Regression Coefficeint B₁,indicates the Regression