1. What do you think of Julie Ruth's analysis?
2. Define the residuals (errors) to be the differences between the actual sales values and the In Example 1.1, the president of Alomega, Julie Ruth, had collected data from her company's operations. She found several months of sales data along with several possible predictor variables (review this situation in Example 1.1). While her analysis team was working with the data in an attempt to forecast monthly sales, she became impatient and wondered which of the predictor variables was best for this purpose.