A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 66 students using Method 1 produces a testing average of 54.9. A sample of 110 students using Method 2 produces a testing average of 85.9. Assume that the population standard deviation for Method 1 is 6.04, while the population standard deviation for Method 2 is 16.44. Determine the 99 % confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2. Step 2 of 3: Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places.

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A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of
66 students using Method 1 produces a testing average of 54.9. A sample of 110 students using Method 2 produces
a testing average of 85.9. Assume that the population standard deviation for Method 1 is 6.04, while the population
standard deviation for Method 2 is 16.44. Determine the 99 % confidence interval for the true difference between
testing averages for students using Method 1 and students using Method 2.
Step 2 of 3: Calculate the margin of error of a confidence interval for the difference between the two population
means. Round your answer to six decimal places.
Transcribed Image Text:A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 66 students using Method 1 produces a testing average of 54.9. A sample of 110 students using Method 2 produces a testing average of 85.9. Assume that the population standard deviation for Method 1 is 6.04, while the population standard deviation for Method 2 is 16.44. Determine the 99 % confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2. Step 2 of 3: Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places.
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