As a summer job, John can work at the park earning $9.75 an hour for 20 hours a week, or as a busboy at a restaurant. As a
busboy he'd be earning $9.25 an hour for a 20-hour week. How
much more would John earn at the park compared to the
restaurant in one week?

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?