Suppose you are calculating a 95% confidence interval for the average weight of a certain type of bag of potato chips. You collect a sample of 15 bags and find a mean weight of 10.15 oz. and a SD of 0.23 oz. From this, you determine your 95% confidence interval. Which of the individual changes in your summary statistics in A–H (without changing anything else) would result in a narrower interval? (Choose all that apply.) 

A. A larger sample size

B. A smaller sample size 

C. A larger sample mean 

D. A smaller sample mean 

E. A larger sample standard deviation

F. A smaller sample standard deviation 

G. A larger confidence level 

H. A smaller confidence level