1. Please write the reference for this journal article using correct APA 6th referencing style. (1 mark) Q2. What was the research hypothesis of this...

1. Please write the reference for this journal article using correct APA 6th referencing style. (1 mark)Q2. What was the research hypothesis of this study? (1 mark)Q3. What level of evidence does this study provide? (1 mark)Q4. What were the independent variable and dependent variables? (3 marks)Q5. Do you think the study addressed a clearly focussed issue? (2 marks)Q6. In your own opinion, is this research design appropriate to answer the research question (1 mark) and WHY? (2 marks)Q7. Who were the participants in the study (1 mark) and how were they sampled? (2 marks)Q8. Briefly discuss if the exposure (independent variable) was accurately measured to minimise bias? (3 marks)Q9. Briefly discuss if the outcome (dependent variable) was accurately measured to minimise bias? (3 marks)Q10. In Table 2, the unadjusted Odds Ratio (OR) for ‘Any Snoring’ is 0.68. Reproduce the calculation of this OR. (Hint: Draw a 2x2 table first) (2 marks). Interpret this in your own words (1 mark) and Comment on statistical significance (1 mark).Q11. The authors have identified quite a few important confounding variables. Please list two confounding variables that you think might be important, that the authors missed? (2 marks) (No marks will be allocated if you simply repeat what authors have already mentioned).Q12. In your own view, what is one limitation and one strength of this study? (2 marks) (No marks will be allocated if you simply repeat what authors have already mentioned). Q13. Does the study have internal and external validity? Justify your answer in less than 300 words. (4 marks)