A carpenter needs to buy either 8-foot or 10-foot piece of lumber that will be cut into three pieces. These pieces will be 4 3/4 feet, 1 5/6 feet, and 2 2/3 feet long.

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?