Below are the histograms of alcohol intake based on diet record (i.e. alco_dr) a
ID: 3130515 • Letter: B
Question
Below are the histograms of alcohol intake based on diet record (i.e. alco_dr) and food frequency questionnaire (i.e. alco_ffq) for 500 male adults. Specifically, each male adult’s alcohol intake is reported on both diet record and food frequency questionnaire.
1. Based on the above histograms, which of the below two correlation coefficients will be better for describing the correlation in alcohol intake between diet record and FFQ?
2. Are the data paired?
3. Which of the following tests will you use to see if there is significant difference between diet record and FFQ in alcohol intake? (Pay attention to the study design and the histograms!)
C)Wilcoxon rank sum test
D)paired t test
A)Pearson correlation coefficient 10 20 30 50 20 40 60 ioo orExplanation / Answer
1,
Here Pearson correlation coefficient is appropriate becuase we want to know the change in one variable is associated with a proportional change in the other variable.
2.
False
3.
Two sample t test becuase there are two independent variables diet record and FFQ.
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