COMM 291 Lecture Notes - Loan Guarantee, Scatter Plot, Coefficient Of Determination
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COMM 291 Full Course Notes
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Question 1: the scatterplot shows a positive, moderately strong, linear relationship between price and size. Price versus size y = 0. 0766x + 21. 398. Ft: please see above for regression line. The estimated regression equation for predicting price from size is: : ho: P-value = tdist(4. 601, 28) < 0. 001 this small p-value indicates that there is a significant linear relationship between size and price : the 95% ci for the slope is. The predicted selling price is ,941, so it is not advisable for the client to buy the house; the asking price of ,000 for the house is unreasonably high: the 95% ci for the mean is. = tinv(0. 1, 28) 1. 701: the 95% pi is. Question 2: h0: all 13 explanatory variables have a coefficient of zero. Ha: at least one of the variables has a non-zero coefficient. The degrees of freedom are df1 = k = 13 and df2 = n k 1 = 2215.
