A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 218 students using Method 1 produces a testing average of 58.7. A sample of 243 students using Method 2 produces a testing average of 54.7. Assume that the population standard deviation for Method 1 is 18.63, while the population standard deviation for Method 2 is 16.17. Determine the 95% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2. Step 1. Find the point estimate for the true difference between the population means. Answer: points Step 2. Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places. points Step 3. Construct the 95% confidence interval. Round your answers to one decimal place. Answer: Lower endpoint: Answer: Upper endpoint:
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 218 students using Method 1 produces a testing average of 58.7. A sample of 243 students using Method 2 produces a testing average of 54.7. Assume that the population standard deviation for Method 1 is 18.63, while the population standard deviation for Method 2 is 16.17. Determine the 95% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2. Step 1. Find the point estimate for the true difference between the population means. Answer: points Step 2. Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places. points Step 3. Construct the 95% confidence interval. Round your answers to one decimal place. Answer: Lower endpoint: Answer: Upper endpoint:
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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
Transcribed Image Text:A researcher compares the effectiveness of two different instructional methods for
teaching anatomy. A sample of 218 students using Method 1 produces a testing
average of 58.7. A sample of 243 students using Method 2 produces a testing average
of 54.7. Assume that the population standard deviation for Method 1 is 18.63, while
the population standard deviation for Method 2 is 16.17. Determine the 95%
confidence interval for the true difference between testing averages for students using
Method 1 and students using Method 2.
Step 1. Find the point estimate for the true difference between the population means.
Answer:
_points
Step 2. Calculate the margin of error of a confidence interval for the difference between
the two population means. Round your answer to six decimal places.
points
Answer:
Step 3. Construct the 95% confidence interval. Round your answers to one decimal
place.
Answer: Lower endpoint:
Upper endpoint:
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