2. Apply your knowledge about confidence intervals to Table 2, below. If the hig
ID: 3320363 • Letter: 2
Question
2. Apply your knowledge about confidence intervals to Table 2, below. If the highlighted section were presented as inferential tests the null hypotheses would be H0: IRR=1. Please fill in the blanks for the following: (4 points)
a. The significance level for these tests would be alpha=_________, ___________-sided.
b. We would reject the null for _______________________________________________________. (e.g., Quartile 1, 2, 3, or 4)
c. The p-value would be > 0.05 for_____________________________________________________.
(e.g., Quartile 1, 2, 3, or 4)
d. The role-type classification for these relationships is C->C (2x2). For Quartile 4, the exposure is ____________________________________, and the levels of that variable are ________________________________________ and ___________________________________________.
e. The outcome is _______________________________________________________________ and the levels are ______________________________________ and ________________________________________.
Table 2-Everyday and Lifetime Racism Scores in 1997 and Asthma Incidence, BWHS, 1997-2011 Scores No. of Cases (Person-y) Age. and Pericd-Adjusted IRR (95% CI) Everyday racism score Quartile 1 Quartile 2 Quartile 3 152 (85,334) 283 (131,042) 329 (129,759) 304 (108,172) 1.00 (Ref) 23 (1.01-1.50) 1.48 (1.21-1.79) 1.68 (1.37-2.04) 1.00 (Ref) 9 (0.98-1 1.39 (1.14-1.69) P for trend .0001 ,0001Explanation / Answer
Can solve 1st 4 parts.
a. Alpha = 0.05/2 = 0.025, Two-tailed test
b. Quartiles 3 and 4
c. p-value > 0.05 for cases with Z-score within (-1.96,1.96) => Confidence interval 95% => Quartile 1 and Quartile 2
d. Exposure is the explanatory variable => data on this seems unavailable. The person asking the question might have this data. Exposure = explanatory variable and the levels are the different categories/values this variable can take
e. Outcome is the response variable => data on this seems unavailable. The person asking the question might have this data. Outcome = response variable and the levels are the different categories/values this variable can take
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.