A quality control inspector for a dog food company thought that the machine that filled the bags of dog food might be overfilling them and wanted to take a sample to analyze. based on 32 bags, the average was 10.9 pounds of dog food per bag. The inspector had a lot of past data on the capability of the machine and knew that the population standard deviation was .65 pounds. Construct a 90% confidence interval. Show your work by giving the formula you are using with all the correct values plugged in. Also explain what the confidence interval tells you.