Question: A researcher compares the effectiveness of two different instruction methods for teaching anatomy. A sample of 33 students using Method 1 produces a testing average of 85 with a standard deviation of 11.26. A sample of 50 students using Method 2 produces a testing average of 85.2 with a standard deviation of 17.42. Determine the 95% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.