(a) Does the plot show a positive association, a negative association, or no association between the two variables? Explain. The plot shows a negative association. On average, as "pulse before marching" goes up, "pulse after marching" goes down. The plot shows a positive association. On average, as "pulse before marching" goes up, "pulse after marching" goes up as well. The plot shows no association. The plotted points appear randomly scattered in the image and no noticeable trend is visible. The plot shows a negative association. On average, as "pulse before marching" goes up, "pulse after marching" goes up as well. The plot shows a positive association. On average, as "pulse before marching" goes up, "pulse after marching" goes down. (b) Explain whether you think the pattern of the plot is linear or curvilinear. The trend in the plot has a strong upward curvature suggesting the plot is best described as curvilinear. The trend in the plot has a strong downward curvature suggesting the plot is best described as curvilinear. The trend in the plot has a strong upward curvature suggesting the plot is best described as linear. The trend in the plot looks approximately like a line indicating the plot is best described as curvilinear. The trend in the plot looks approximately like a line indicating the plot is best described as linear. (c) According to MayoClinic.com normal resting pulse rates for adults range from about 60 to 100, and for well-conditioned athletes they range from about 40 to 60. Using this information, explain whether there are any outliers in the scatterplot that are obvious mistakes. If there are outliers, describe where they are located on the plot. O O O O O There are 4 obvious mistakes (46, 64), (55, 64), (56, 64), and (60, 60) since these values fall outside the guidelines. There are 2 obvious mistakes (76, 104) and (80, 104) since these values fall outside the guidelines. There are 2 obvious mistakes (46, 64) and (55, 64) since these values fall outside the guidelines. There are 4 obvious mistakes (88, 100), (96, 100), (76, 104), and (80, 104) since these values fall outside the guidelines. There are no obvious mistakes in the scatterplot, as all the data are consistent with the guidelines. Dataset pulsemarch is available here. The figure for this exercise is a scatterplot of y = pulse rate after marching in place for 1 minute versus x = resting pulse rate measured before marching in place. 105- 100- Pulse after marching 95- 90 80 75 70 65. 60. 45 50 55 60 65 70 75 80 85 90 95 Pulse before marching