Suppose that you wanted to study the relationship between the amount of tin extracted from a product based on its refluxing time when the product is boiled with hydrochloric acid. Is there a relationship between these two variables?
You have decided to use the refluxing time in minutes(min) as the predictor, X, and the amount of tin extracted in milligrams per kilogram (mg/kg) as the criterion, Y. To test your Excel skills, you have randomly chosen 12 samples of this process, and have recorded the hypothetical scores on these variables in Fig 1