A manufacturer of automobile spark plugs has several production facilities spread across a wide geographical area. The quality control manager at each plant budgets a certain amount of money (QC 5, measured in thousands of dollars) for quality control efforts each week (maintenance of equipment, time spent on process evaluation, etc.). Each manager also determines the percentage of defective spark plugs (% DEF) produced each week. The company’s vice president of operations has collected a sample of data to determine the association between these variables. A scatterplot, fitted line, and summary output for a simple regression model are provided:
Please check attached file.