1. A marketing company wants to determine if the combined years of experience of its staff who worked on a proposal have an impact on the chance of winning a contract. What is the equation of an appropriate model?
2. A health care facility is exploring the relationship between annual costs based on the number of patients seen and the number of emergency cases.
(a) Explain what an outlier means in this context. How would you statistically test for the presence of an outlier?
(b) In this context, what do you do if you find some outliers?
(c) What would an influential observation be in this context?
(d) How would you test for the presence of influential observations?