Tomato sauce is packaged in a bottle designed to hold a nominal 16 oz of product. Eight samples of 4 bottles were randomly inspected. The results are listed in the following table:

1. Calculate the sample means and sample standard deviations.
2. Calculate the control limits for -chart and s-chart. What can you say about this process?
3. Estimate the population mean and standard deviation.
4. Estimate what percentage of products from the current process will meet the specification?

Sample 1 2 3 4 5 6 7 8 Measurements 16.3 15.4 16.3 16.5 16.7 16.2 16.1 15.9 15.5 16.8 16.0 16.2 16.5 16.2 16.7 16.4 16.2 16.5 16.3 16.4 16.0 15.7 16.1 15.7 15.9 15.9 16.6 15.8 15.8 15.9 16.3 16.0 Mean Std. Deviation