0. 8 22. 4 2. We have two groups of data, A and B. A and B have weights and heights. We assume heights and weights have a linear relationship. The data in A has the correlation coefficient, r = -0.8. The data in B has the correlation coefficient, r = 0.7. (a) Which group has more stronger relationship between heights and weights? (b) Which group has a positive relationship between heights and weights? (c) Which group has a negative relationship between heights and weights? 3. Use the chocolate/Nobel data in the lecture note to predict the Nobel rate for a country with chocolate consumption of 15 kg per capita. We assume the regression line between the Nobel rate (y) and the chocolate consumption (x) with y = 3.37 + 2.49x