Last word that is cut off is residual

Ryan et al (1994) describe the data for the next set of problems as follows: In autumn, small winged fruit called samara fall off maple trees, spinning as they go. A forest scientist studied the relationship between how fast they fell and their "disk loading" (a quantity based on their size and weight). The samara disk loading is related to the aerodynamics of helicopters. The data give the loadings and fall velocities for fruit from three trees. Note: you can use the term "units" to describe both load and velocity if needed in the following questions. Variable Description Tree 1 to 3 Loading Disk loading Velocity Fall velocity Find boxes A-E in the Stata output from Exhibit 1. Show all your work, but record your final answers on the following lines (10 pts): Exhibit 1 regress Velocity Load Source SS df MS Number of obs 32 F (1, 30) 131 . 68 Model . 723432487 A . 723432487 Prob > F 0 . 0000 Residual . 164814388 30 . 005493813 R-squared 0 . 8144 Adj R-squared 0. 8083 11 Total E B 028653125 Root MSE D Velocity Coef. Std. Err. t P> ItI [95$ Conf. Interval] Load 5. 546493 . 483344 C 0. 000 4. 559372 6.533613 cons -. 037738 . 1011162 -0.37 0. 712 - . 2442449 . 1687688 b. What percent of the total variation in velocity can be attributed to the model above? (2 pts) c. Is the regression coefficient on load statistically significant? Show all 5 steps of the hypothesis test. Use alpha=.05 (5 pts) d. Interpret the intercept (2 pts) N e. Interpret the coefficient for "Load" in the model. (2 pts) f. Write the estimated regression equation from this Stata output. (2 pts) g. What is the predicted velocity for a samara with a disk loading .20? (2 pts) h. In the data, a samara with a disk loading of .20 has a recorded velocity of 1.10. What is its