Please use this template to help answer the questions listed in the lab instructions. The “steps” below refer to the steps listed in the lab instructions. Type your answers and post your screenshots in the spaces given.
Summary of Articles
Write a few complete sentences summarizing what you learned from the articles provided.
A. Summary of Article #1
B. Summary of Article #2
C. How do you think confidence intervals can be used in health sciences? Use the articles to inspire and support your answer.
Data Collection
Use the data set you collected for the Week 5 lab (heights of 10 different people plus the 10 heights provided by your instructor).
Instructor Provided
My own
For the remainder of this lab, treat the 20 numbers as ONE sample.
Provide a screenshot of your Week 5 Data (20 Heights) from the Week 6 Spreadsheet Sample Mean and Standard Deviation tab (be sure that your mean, standard deviation, and all 20 data values from the spreadsheet are visible).
Summarize the Preliminary Calculations (Round to 2 decimal places):
Sample Mean: ______
Standard Deviation: _______
Your Height: _________
Please answer the following questions in complete sentences:
1. Discuss your method of collection for the values that you are using in your study (systematic, convenience, cluster, stratified, simple random). How did you determine the method you selected was the method used?
2. What are some faults with this type of data collection?
3. What other types of data collection could you have used, and how might this have affected your study?
4. What is the population represented by your sample?
Calculation of 95% Confidence Interval
1. Give a point estimate (mean) for the average height of all people in your study. What is your point estimate, and what does this mean?
2. Find a 95% confidence interval for the true mean of heights. What is the interval? [Provide a Screenshot of your work from the t value Confidence Interval for µ from the Confidence Interval tab on the Week 6 Excel spreadsheet]
3. Give a practical interpretation of the 95% confidence interval [Write a complete sentence].
Calculation of 99% Confidence Interval
Now, change your confidence level to 99% for the same data.
1. Find a 99% confidence interval for the true mean of heights. What is the interval? [Provide a Screenshot of your work from the t value Confidence Interval for µ from the Confidence Interval tab on the Week 6 Excel spreadsheet]
2. Give a practical interpretation of the 99% confidence interval [Write a complete sentence].
Compare Margins of Error
1. Would the margin of error be larger or smaller for the 99% Confidence Interval as compared to the 95% confidence Interval? Explain your reasoning.
2. As the confidence level increases, what happens to the Margin of Error? Why does this happen?
Save and Submit
Be sure your name is on the Word document, save it, and then submit it. In the assignment module, click “start assignment” and then “upload file” and “submit assignment”.