Sampling and Measurement - Statistics Assignment Help

Assignment Task

Assignment 2: Sampling and Measurement

Use both of same articles that you selected for assignment 1:
For BOTH articles:

1. Describe how the participants (and or the controls) were selected.
2. Give an opinion as to the representativeness of the sample with respect to the target group stated
3. Describe the main measurement used for the study and comment on the adequacy of its description
4. Has the validity of the measurement been stated?
 

Assignment 3: Statistics

Question 1: Please answer the following questions for your article on a randomised controlled trial and motivate your answers throughout:

1. Name one categorical variable of which the results are summarised in the article. Which type of categorical variable is it?

2. Name one numerical variable of which the results are summarised in the article.

i). Which measures are used in the article to summarise the centrality and spread of the variable?
ii). Based on the above, is the distribution of the data symmetric or skew?
 

3. Is an indication given in the article that the power of the study to detect a specific result was considered during the planning of the study to determine the sample size?

Question 2: Please answer the following questions for your article on an analytical study and motivate your answers throughout:

1. Are any risk measurements (such as relative risks, odds ratios) given to describe the association between exposure/risk factor and outcome/disease?
i). If so, which one(s)?
ii). If not, could risk measurements have been calculated in this study?

2. On what type of significance is the focus in the presentation of results: statistical or clinical?

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