Additional question Bulls can develop respiratory issues as they get older. This may compromise their ability to breath properly which affects their energy level and overall health. Aresearcher wishes to conduct a study to find which of two injection therapies. Therapy A or Therapy B, is more effective in improving respiratory health. A total of 180bulls that are at least 12 years old will be randomly selected from ranches in the state of Texas. The researcher will get consent from all owners, treat the bulls for eightmonths and evaluate changes in respiratory health.Part A: How would the study benefit from adding a control group? (2 points)Part B: What is the best way to randomly place the bulls into the Therapy A, Therapy B, and control groups? (4 points)Part C: The researcher wants to use a blocking variable to place the bulls into groups instead of doing it randomly. He decides to block either by breed or ranch.Explain which would be the best blocking method. (4 points)

When 25 employees were first hired in 2011 for a pharmaceutical company, Company A, the starting annual salary was $38,000. A competing pharmaceutical company, Company B, had the same starting salary for 25 employees hired the same year. In 2016, data was collected on the annual salaries of these same employees at each company. This data is displayed in the boxplots shown: Company A Company B 80,000 70,000 60,000 50,000 Annual Salary (US Dollars) 40,000 30,000 20,000 10,000 0 Part A: Compare the annual salary distributions (4 points) Part B: What are the pros and cons of working at each company? Explain using what you found in Part A. (6 points)