# Week 7 Lab Assignment

Question # 48484 | 9 months ago |
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$12 |
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**i have also attached week 6 spreadsheet**

**Week 7 Lab Assignment**

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**Name:________________________ Instructor Name: _______________**

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.

1. Write a paragraph summarizing what you learned from the articles provided. Consider the use of confidence intervals in health sciences with these articles as inspiration and insights.

You will need

· your Week 5 Lab Data!!

·
the Week 6 Spreadsheet from the **Week
6 Lesson: From Samples to Populations **or the **Getting Started **module
under **Resources. **

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**Step 1: Article **Summaries

A. Quick summary of 1st article:

B. Quick summary of 2nd article:

C. Consider the use of confidence intervals in health sciences with these articles as inspiration and insights for the rest of the lab

**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). (**NOTE:**
This is NOT the data used in the lab video at the bottom of this
assignment, which is about midterm grades.
Do NOT use the midterm grades data.)

Instructor Provided

My own

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**Provide a screenshot** of
your Week 5 Data (20 Heights) from the **Week 6 Spreadsheet** (be sure that
your mean, standard deviation, and all 20 data values from the spreadsheet are
visible).

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**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). What makes it this method?

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**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?

**Calculation
of 95% Confidence Interval**

**1.
**Give a point estimate
(mean) for the average height of all people in the place from which you pulled
your data (use all 20 of your lab values to find this). What is your point
estimate, and what does this mean?

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**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**]

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**3.
** Give a practical interpretation of the 95%
confidence interval (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"). [**Write a complete sentence]**.

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**Calculation
of 99% Confidence Interval**

Now, change your confidence level to 99% on the Excel spreadsheet for the same data.

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**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**]

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**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% CI? Explain your reasoning.

**2.
**As the confidence level
increases, what happens to the Margin of Error, and 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”.