1. Which of the following is (are) not the possible value(s) of Pearson's correlations? Choose all that apply a) 1.6 b) 0.0 c) -0.99 d) 1.0 e) -1.01 2. A regression coefficient in multiple regression is the partial slope of the linear relationship between the criterion variable and the part of a predictor variable that is independent of all other predictor variables a) True b) False 3. A professor believed that there is a correlation between people's weights and number of times they eat out. He recorded a group of students' weights (measured in lbs.) and the number of times they ate out last week. The r value was 0.90. We can tell that the correlation between students' weights (measured in kilogram) and the number of times they ate out last week is: a) 0.90 b) Bigger than 0.9 c) We cannot tell d) Smaller than 0.9 4. A researcher is interested in the correlation between the number of oranges consumed per day and their blood Vitamin C levels. Imagine for 200 high school students, as the number of oranges consumed per day increases, the Vitamin C level increases. Thus, the correlation between oranges consumed per day and the Vitamin C level is: a) Not correlated b) Negative c) Positive 5. If X and Y are perfectly and negatively correlated, the correlation should be: a) b) c) d) 1.0 -0.5 -1.0 0.0 6. In the figure shown above, we can tell the percentage of children in each country who are underweight and the percentage of the population that has access to the safe water is: a) Perfectly and positively correlated b) Negatively correlated c) Positively but not perfectly correlated 7. A professor wanted to examine the correlation between people's weights and energy expenditure. Imagine that the correlation between people's weights (measured in lbs.) and energy expenditure (measured in kcal) is 0.67. We can also tell the correlation between people's weights (measured in kg.) and energy expenditure(measured in Joules, an unit for energy) is: a) b) c) d) e) 0.134 0.067 -0.67 0.0067 0.67 8. For the a set of values of x and y, if Pearson's Correlation r is equal to -1.00, it means__ (Points : 0.1) a) x and y are positively and perfectly correlated b) x and y are not positively correlated c) x and y are not correlated d) x and y are negatively and perfectly correlated 9. For a set of X values and Y values, if X increases, Y increases. Thus, the correlation between X and Y is: a) Positive b) Negative c) No correlation 10. In the figure shown above, the Pearson correlation r value between the percentage of children in each country who are underweight and country's gdp is __ a) Mostly positive b) Appears to be negative between 0 and 3000 and then appears to be flat between 3000 and 8000 c) Perfectly negative d) Zero