Question 7 (4 points] 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. null! II II! 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? 0 Pearson correlation coefficient 0 Spearman correlation coefficient Question 8 (2 points] Continued from Q7. Are the data paired? 0 Yes 0 No Question 9 (5 points] Continued from Q8. 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!) O Signed rank test 0 Two sample t test 0 Wilcoxon rank sum test 0 McNemar's test