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1. Which variable, Length or Shell Weight, would serve as a better linear predictor of the number of rings of an abalone shellfish? OA. Shell Weight, because it has a smaller correlation with Rings than Length does 0 B. Length, because it has a larger correlation with Rings than weight does 00. Shell Weight, because it has a larger correlation with Rings than Length does 0 D. Length, because it has a smaller correlation with Rings than weight does 2. Use the summary results to compute the slope and intercept of the regression equation to predict Number of Rings from Length. Remember not to use a rounded value for b1 when you are calculating b0. Submit your answers out to at least 6 decimal places. bl = and b0 = 3. The oldest shellfish in the sample had a Length of 0.62 and a Shell Weight of 1.2255. Its observed Number of Rings was 23. Compute the expected Number of Rings of the shell using your linear regression from part 2, along with its residual. Submit your answers out to at least 4 decimal places. Expected number of rings = and Residual = 4. Fill in the blanks to correctly interpret the residual from part 3. The regression equation 7?? v the number of rings for this shellfish. We know this because the residual value is 7?? v . (7 points) How old is the abalone? ~ Abalone (sometimes called ear-shell) are a type of gastropod shellfish known for their colorful inside shell. The age (in years) of an abalone is determined by cutting the shell through the cone, staining it, and counting the number of rings through the microscope in a manner like counting the rings of a tree trunk. Because this is a tedious and time-consuming task, researchers sought to determine whether the approximate age of an abalone shellfish could be predicted using an easier-to-determine measurement. Use the results below of a sample of n = 200 randomly selected abalone shellfish to answer the questions that follow. Rings by Length Rings by Shell Weight 20 15 No. of Rings No. of Rings ... .. . .. . . . . . O .mm. . . 0.2 0.3 0.4 0.5 0.6 0.7 0.0 0.1 0.2 0.3 0.4 0.5 0.6 Length (mm) Shell weight (grams) Variable Mean Sample SD No. of Rings 10.195 3.4997 Length (mm) 0.1245 Shell Weight (grams) 0.8261 0.509 Correlation Length Shell Weight No. of Rings 0.5576 0.5413