Scenario/Summary

The highlight of this week's lab is confidence intervals and the use of these intervals in the health sciences.

There is a short reading that specifically relates confidence intervals to health sciences and then you are

asked to demonstrate your knowledge of confidence intervals by applying them in a practical manner.

Deliverables

The deliverable is a Word document with your answers to the questions posed below based on the article you

find.

Required Software

• Microsoft Word
• Internet access to read articles

Steps to Complete the Week 7 Lab

Step 1: Find these articles in the Chamberlain Library. Once you click each link, you will be logged into the

Library and then click on "PDF Full Text".

• First Article: Confidence Intervals, Part 1 (Links to an external site.) (Links to an external site.)Links to an external site. (Links to an external site.)
• Second Article: Confidence Intervals, Part 2 (Links to an external site.) (Links to an external site.)Links to an external site. (Links to an external site.)

Step 2: Consider the use of confidence intervals in health sciences with these articles as inspiration and

insights.

Step 3: Using the data you collected for the Week 5 Lab (heights of 10 different people that you work with),

discuss your method of collection for the values that you are using in your study. What are some faults with

this type of data collection? What other type of data collection could you have used, and how might this have

affected your study?

Step 4: Now use the Week 6 Spreadsheet (Links to an external site.) to help you with calculations for the

following questions/statements.

• Give a point estimate for the average height of all people at the place where you work. Start by putting

the ten heights you are working with into the blue Datacolumn of the spreadsheet. What is your point

estimate, and what does this mean?

example of adding a point estimate to spreadsheet

• Find a 95% confidence interval for the true mean height of all the people at your place of work. What is the interval?

example of finding 95 percent confidence interval in spreadsheet

• Give a practical interpretation of the interval you found in part b, and explain carefully what the output means. (For example, you might say, "I am 95% confident that the true mean height of all of the people in my company is between 64 inches and 68 inches").
• Post a screenshot of your work from the t value Confidence Interval for Âμfrom the Confidence

Intervaltab on the Week 6 Excel spreadsheet

Step 5: Now, find a 99% confidence interval for the same data. Would the margin of error be larger or smaller

for the 99% CI? Explain your reasoning.

Step 6: Save the Week 7 Lab document with your answers and include your name in the title.

Step 7: Submit the document.