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IT 223 -- Project 3C

Addional Regression Problem

Part C

• 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?