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Project 3

Part C

• No SPSS analysis is needed for this part.
• The heights (x) and weights (y) of a population of adult giraffes is bivariate normal with
       x = 16.5 ft.   SD_x = 3.8 ft.   y = 2,400 lbs.   SD_y = 300 lbs.   r = 0.75
  
  1. Determine the regression equation for predicting weight from height.
  2. What percentage of giraffes weigh more than 2,900 pounds?
  3. What is the predicted weight for a giraffe that is 20 feet tall?
  4. What is the root mean squared error for predicting weight, given the height?
  5. Of the giraffes that are about 20 feet tall, what percentage weigh more than 2,900 lbs?