401077: Introduction to Biostatistics Physical Activity in Adolescence - Statistics Assignment Help

Assignment Task:

TASK:

Question 1 (18 marks)
Read the paper Deere K, Williams C, Leary S, et al (2009). Myopia and later physical activity in adolescence: a prospective study. British Journal of Sports Medicine, 43,542–544.
Critically appraise of the statistical material in this paper against items 10, 12-17 of the STROBE checklist. Present your review as a 400-500 word (approx.) report.
Notes:

• Only review the provided paper Deere et al, 2009. Do not read any other papers.
• Restrict your review to how well Deere et al have documented their statistical methods – that is, items 10, 12-17 of STROBE only. You may not have to address every item; just describe the major strengths and weaknesses of the authors’ descriptions of their statistical methods and results.
• For each important STROBE item:
• state whether you believe the STROBE item is met or not,
• support your judgment with proof or examples from the paper, and
• describe why this inclusion or exclusion is important / how it will impact on the reader’s understanding and decision making.
• The 400-500 words is a guideline not a rule. There are no penalties for exceeding this guideline.
• There are no marks for adding a reference list. Referencing is optional.
   
• Question 2 (22 marks) Note: Students will get different answers as the data sets differ.

Using the data set assigned to you for your Assignments address the following research question:
Does myopia status predict sedentary hours per week after correcting for age in the population of young adult Australians?
Notes:

• You should only use the variables ‘sed’, ‘myopia’ and ‘age’.
• Correcting for ‘age’ is just including ‘age’ in the regression model.  When age is in the model all other variables are corrected for it.
• Do report the results of your descriptive analyses
• Well labelled graphs can be copied from R Commander
• Summary statistics and tables should be manually typed
• Summarise the main findings of your descriptive analyses in words and describe how these findings inform your expectations and interpretation of the more complex models.
• Do report the results of your statistical inference and/or regression models
• Any fitted regression models should be manually typed and described in the text.
• Any hypothesis tests should contain all relevant information (use the 5 step method to be sure)
• Any other results such as confidence intervals should be manually typed and described in the text.
• Summarise the main findings of your regression model and statistical inference in one or two paragraphs.
• Do remember to answer the research question
• Write a final paragraph which summarises the key findings of your analysis and your answer to the research question.
• Do check the Learning Guide for the marking criteria
• Do write your answers yourself and keep them private.