Question 4.154

56. Brain and Body Weight. Refer to your work from Exercise 48.

  1. Estimate the brain weight for a mammal with a body weight of 100 kilograms.
  2. Is the interpretation of the intercept from Exercise 48 useful? Explain.
  3. Is it OK, or is it misleading to use the regression equation to predict the brain weight for a mammal with body weight of 10 kg? Explain.
  4. Explain the distinction between your result from part (a) and the actual brain weight of 157 grams for the mammal from the data table.
  5. Calculate and interpret the prediction error for your prediction in part (a).