8) Are wealthier people happier? A research study made by No…

8) Are wealthier people happier? A research study made by Northern Illinois University College of Education used an existing data set with 959 participants in the New York City. Simple linear regression analysis is applied to confirm the association between income and happiness. The study shows that there is statistically significant correlation between income and happiness, however, the relationship is really weak. The equation of happiness and income is:  Ŷhappiness = 3.567 + 0.306 * income + 0.86.   Select the following statements which you believe to be true:  

A study of the sedentary behaviors as a risk factor for brea…

A study of the sedentary behaviors as a risk factor for breast cancer found that the relative risk of breast cancer over 15 years for women classified as sedentary compared with women classified as physically active was 3.0. Assuming that important confounding variables were controlled, the correct interpretation of this finding is that women who are sedentary compared with those who are active: 

16) Below is the histogram of the HDL-cholesterol levels for…

16) Below is the histogram of the HDL-cholesterol levels for non-obese (solid line, normal subjects) and obese (dashed line, obese subjects) subjects. Based on the histograms above, with regard to the mean HDL-cholesterol level of the two groups, independent two samples t test will show which of the following: