Homework answers / question archive / PBH 730 Unit 1 Homework   Instructions: There are three sections: Recommended Problems: Students should try to answer all problems presented in each chapter to include review questions and exercises not assigned as required

PBH 730 Unit 1 Homework   Instructions: There are three sections: Recommended Problems: Students should try to answer all problems presented in each chapter to include review questions and exercises not assigned as required

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PBH 730 Unit 1 Homework

 

Instructions: There are three sections:

1. Recommended Problems: Students should try to answer all problems presented in each chapter to include review questions and exercises not assigned as required.  These problems give you additional practice but will not be graded and should not be turned in with your homework.  The answers for many of these problems are available in the text or on the companion website for the text. 
2. Required Questions from the Course Text:  These problems must be completed and turned in for credit.  Failure to do so will result in lost points.  For problems with data, most will have an associated data set.  All data sets for the class have been downloaded and can be found in the content area of the course.
3. Required Additional Questions:  These problems must be completed and turned in for credit.  Failure to do so will result in lost points. 

Be sure to review the assignment carefully to make sure you have answered all the questions and all the parts to each question.  Remember to review the assignment guidelines & policies in the syllabus.  Here are a few specific reminders:

• Do not use quotes in your explanations – learning how to explain results and concepts in your own words is an important part of processing these concepts.
• Show all the intermediate steps for any calculations (formula, substitution of numbers into formula, calculations) in order to receive partial credit.  Showing your work also helps me to understand where you may have gotten off track when you get a problem wrong which means that I can provide you with more detailed feedback.
• Remember to include both the word documents and any other files such as Excel spreadsheets and SPSS outputs (e.g. graphs, tables, results) for any problem that involves the use of Excel, SPSS, or any other software or website.  In addition, make sure that you highlight the relevant statistic in the output or report the number in the text of your answer.
• Make sure you understand the guidelines about collaboration on assignments, how to name and submit your homework file and the course policies for due dates and late work.
• The class discussion board (under questions) is a great place to ask questions about the homework including questions about logistics, clarification about assignment expectations, or clarification about how to approach a problem. I also encourage you to jump in and provide answers to questions that your classmates ask.

1. Required Problems from Text:
   1. Chapter 1:  Review Questions:  1.5, 1.7, 1.10, 1.11, and 1.12 (0.25 points each)

Exercise Questions:  1.8 (1 point), 1.14 (1 point), 1.16 (1 point) 

1. 2. Chapter 2:   Review Questions:  2.4, 2.5, 2.12, 2.20, and 2.21 (0.25 points each)

Exercise Questions:  2.4 (1.75 points), 2.10 (1 point), 2.14 (1 point), 2.18 (1 point)

1. 3. Chapter 3:   Review Questions:  3.2 (2 points), 3.3, 3.10, 3.11, and 3.16 (0.25 points each)

Exercise Questions:  3.2 (2 points), 3.6 (2 points), 3.14 (1 point)

You can use Excel to construct your stem and leaf plots and frequency tables.  If you use Excel, you must include your Excel file in your submission.  For a tutorial on stem and leaf plots please see https://youtu.be/bsYmXapWDk8.

1. 4. Chapter 4:  Review Questions:  4.4, 4.18, 4.19, 4.20, and 4.24 (0.25 points each)

Exercise Questions:  4.2 (0.5 point), 4.6 (2 points), 4.10 (1 point), 4.12 (1 point), 4.14 (2 points), 4.22 (1 point)

You can use Excel to construct your boxplots.  If you use Excel, you must include your Excel file in your submission.  For a tutorial on boxplots please see https://youtu.be/TxuretcM5Uk.  You should use SPSS to complete problem 4.22.  The following link will provide a tutorial on opening data files in SPSS https://youtu.be/HcMZ2BLdGw0.  All data files can be found in the content area of the course.

1. 5. Chapter 5:  Review Questions:  5.1, 5.4, 5.5, 5.10, and 5.14 (0.25 points each)

Exercise Questions:  5.2 (0.5 point), 5.8 (2 points), 5.12 (1 point),

2. Additional Problems (Extra Credit):

 

1. The graph below displays findings about overweight and obesity in individuals from Mexico by different regions of the country.  It was published in a paper examining risk factors for the increasing diabetes rates in this population (Martorell R.  Diabetes and Mexicans, Why are the two linked?  Prev Chronic Dis. 2005 January; 2(1): A04)

 

 

1. What type of graph is this?  (0.25 point)
2. Is this an appropriate type of graph for the data displayed? (0.25 point)
3. Summarize (in 3 sentences or less) the main findings shown in the graph. (0.25 point)
4. Do you think the graph is effective at communicating the findings?  Justify your answer. (0.25 point)

2. Find an article published in a peer reviewed journal that includes at least one example of the descriptive statistics or graphs covered in Unit 1 in the results section of the paper. Ideally the paper would be on a topic that is of interest to you.  Good places to look for articles include the Journal of the American Medical Association, New England Journal of Epidemiology, American Journal of Public Health, Journal of Epidemiology, Nature, Lancet, Science, etc.

Using the article that you have selected, address the following questions:

1. 1. Write out the full citation of the article using either APA style or AMA style.  (0.25 point)
   2. Provide a one to two sentence summary of the aim of the study (0.25 point)
   3. Is there a description of the type of statistics used in the article?  Often – but not always - articles will include a section on analysis in the methods section. (0.25 point)
      • • If yes: what statistics are specified?
        • If no: what types of statistics appear to be used in the article (types of graphs, means, standard deviations, t-tests, ANOVA, linear regression).
   4. Select a graph or table that includes at least one of the descriptive approaches from Unit 1. 
      1. Reproduce the table or figure in your paper.  (0.25 point)
      2. Identify the descriptive approach used (name the statistics or type of graph) (0.25 point)
      3. Is this approach appropriate given the level of measurement of the data? Justify your answer. (0.25 point)
      4. Explain the main findings of the graph or table (remember – this is your own evaluation, not the authors).  (0.25 point)
      5. Is the graph or table effective?  Explain why or why not. (0.25 point)