a sporting goods store sells sets of golf clubs with steel shafts for $359. sets of golf clubs with graphite shafts cost $559. last month the store sold 14 sets of golf clubs for $6,826. how many sets of each type of golf club were sold? set up and solve a system of equations to find the answer.

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?