Cesar wants to know what the expected weight of a loaf of breadfor quality control purposes. Based on a sample of 14 loaves ofbread, he finds a sample average of 400 grams with a samplestandard deviation of 15 grams.
- What’s the confidence interval at 95%?  What is it at99.9%?
- What would the confidence intervals (for 95% and 99.9%) be ifthe sample average was based on 140 loaves instead of 14?
