it answers on answer sheet. 11. Dairy farmers are aware there is often a linear relationship between the age, in years, of a dairy cow and the amount of milk produced, in gallons per week. The least-squares regression line produced from a random sample is milk = 40.8 - 1.1(age) with 12 = 0.36 Based on the model: (3 pts each) A. Determine the value of the correlation coefficient. B. Predict a cow's production at age 4. C. A certain cow is 8 years old and the residual was 5 gallons. What was the cow's actual production? D. Based on the model, what is the difference in predicted amounts of milk produced between a cow of 5 years and a cow of 10 years? BONUS (+2): COMPLETE LAST! MAKE SURE YOU HAVE TIME TO FINISH! Students expose marine bacteria to X-rays for time periods from 1 to 15 minutes. They record the number of surviving bacteria (in s) on a culture plate after each exposure time. A logarithmic regression is the best fit for this data with the least squares given below. surviving bacteria = 329 - 121 . In(time exposed) BONUS (+2): The actual number of surviving bacteria (in hundreds) for a time t is 106. Its residual is -6.2. Find the amount of time this bacteria was exposed to X-rays