Name______________________________________Module_5_Homework

Name:______________________________________

Module 5 Homework Assignment

The paired data below consists of test scores and hours of preparation for 5 randomly selected students. Use this data set to answer the questions below:

x Hours of preparation 5 2 9 6 10

y Test score 64 48 72 73 80

1. Use the given data to find the correlation coefficient r, regression equation and scatter plot in MS Excel.

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2. Based on the linear correlation coefficient r, is this a good model? Explain.

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3. What is the best predicted test score for a student who spent 7 hours preparing for the test?

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4. Find the standard error . Use formula or MS Excel.

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5. Find the 99% prediction interval for the test score of a person who spent 7 hours preparing for the test.

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6. Find the explained variation.

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7. Find the unexplained variation.

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8. Find the total variation.

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9. Find the value of r2 and explain its meaning.

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10. If the data point ( 3, 100) is added to the data set, how would this effect the results of the regression analysis? Is this data point an outlier, influential point or both? Explain.

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Module 8 Paper

1. Conduct an online audit of yourself.

a. Search Google, Bing, and Yahoo.

i. If you have a Google account, search both logged in and logged out.

b. Search Facebook, LinkedIn, and Twitter.

c. Use at least 3 of the tools identified in the articles assigned for reading in this module.

2. Are you entirely comfortable with the information that appears? Will you use features such as Google Alerts? Why or why not?

3. Based on what you found in the audit, what actions can you take to remove unsuitable or irrelevant content? Can you remove it yourself by making changes to online profiles? If the information is on someone else’s site, can you contact that person and ask for it to be removed?

4. What are three steps you can take to set up a professional presence online?

5. Review the privacy settings on your social networking profiles. What changes can you make to protect your information?

6. Summarize your answers in a proper and professional email addressed to your instructor in the space below.

TO: Nancy Martin

CC:

Subject: online self audit

Dear Dr. Nancy,

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