QA: Returning to the diamonds dataset from RStudio and remake a new column in the diamonds dataset for the total diamond volume (assuming that the diamond is a rectangular prism). We need to clean up the dataset by removing all of the zero volume values. There is one additional extremely large value of the volume that is unlike any of the others. Report the entire row of data for that strange point and then remove if from your dataset. We will attempt to use the diamond volume to predict the diamond carats. Make a plot to showcase the data cleaning that you've achieved.

QB: Produce 90% interval estimates for the intercept and the effect of a 1 unit change in diamond volume. Provide the math formula with numbers and the solution included.

QC: Test the one sided null hypothesis that the slope is greater than 160. Show the math and the equations with numbers.

And Test the one sided null hypothesis that the slope is less than 161.25. Show the math and the equations with numbers.