A researcher compares the effectiveness of two different instructional methods for teaching pharmacology. A sample of 63

63 students using Method 1 produces a testing average of 52.2

52.2. A sample of 93

93 students using Method 2 produces a testing average of 72.3

72.3. Assume that the population standard deviation for Method 1 is 15.92

15.92, while the population standard deviation for Method 2 is 17.96

17.96. Determine the 95%

95% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.

Step1of3:Find the point estimate for the true difference between the population means.