2. Which of the following is equivalent to the expression 9x2 - 16? A. (3x - 4)2 B. (9x - 4)(9x + 4) C. (3x - 8)(3x + 8) D. (3x - 4)(3x + 4)

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?