. A quality control specialist for a restaurant chain takes a random sample of size 12 to check the amount of soda served in the 16 oz. serving size. The sample mean is 13.30 with a sample standard deviation of 1.55. What is the error bound of the 95% confidence interval? HINT: Be sure to use the Student's T-table for your solution since you are using a random sample and you do not know information about the population standard deviation.