pleasw help!

QUESTION 14 If we have the model: Y = Bo + $1X1 + $2X2 + $3X3 + $4X4 + 8 And we wish to test the usefulness of the whole model, what is the null hypothesis? O Ho : B1 = P2 = 13 = 0 O Ho : P1 = 0 O Ho : P1 = $2 = $3 = B4 =0 O Ho : B2 = 3 = 0QUESTION 20 What graph do we use the check if the assumption of constant variance of error is valid? (check Var(s) = 6-) O Scatterplot of Y vs. X1 O Histogram of Residuals O Normal Probability Plot O Residuals vs. Fitted ValuesQUESTION 22 We are trying to predict Y using X1 X2 and X3. If we create a complete second order model with all interaction what is k, the degree of freedom for regression? OK=3 O K = 10 OK =4 O K = 11QUESTION 25 When looking at the scatter plot of Y vs. X. how can you tell if a higher order term is needed in the model? O The graph has an obvious curve pattern O The graph has a linear pattern O All of the points fall within 2 standard deviations of the mean O The graph has no pattern, it is random scatterQUESTION 30 Use the output provided in the formula sheets folder. In the reduced model, what is the value of R-? O 0.398 O 0.795 O 0.577 O 0.205QUESTION 31 against? Use the output provided in the formula sheets folder. In testing if the reduced model is useful, the F statistic is Feal = 13.58. What would be the critical value from the F table that we would compare this O 3.86 O 4.74 O 19.4 O 4.93QUESTION 32 Use the output provided in the formula sheet folder. In the reduced model, when: is the estimated value for betal_hat? O 4197 O 0.47 O 1.03 O 6.54