A manufacturer suspects that the batches of raw material furnished by his supplier differ significantly in calcium content. There are a large number of batches currently in the warehouse. Five of these are randomly selected for study. A chemist makes five determinations on each batch and obtains the following data. Batch 1 Batch 2 Batch 3 Batch 4 Batch 5 23.46 23.59 23.51 23.28 23.29 23.48 23.46 23.64 23.40 23.46 23.56 23.42 23.46 23.37 23.37 23.39 23.49 23.52 23.46 23.32 23.40 23.50 23.49 23.39 23.38 (a) Is there significant variation in calcium content from batch to batch? Use a -0.05. (b) Estimate the components of variance Find a 95 percent confidence interval for 1/60 (d) Analyze the residuals from this experiment. Are the analysis of variance assumptions satisfied