Question: Did you know that sometimes you eat more just because the food is in front of you? Geier, Rozin, and Doros (2006) studied how portion size affected the amount people consumed. They discovered interesting things, such as people eat more M&M's when they are dispensed using a big spoon compared with when a small spoon is used. They investigated this phenomenon with two other food products as well, soft pretzels and Tootsie Roll candies. Not only are their findings informative for individuals who might want to lose weight by reducing their food intake, they are also valuable for restaurants and other reception areas where one might want to save money on the free candies offered by reducing customer consumption rates. Let's explore this last phenomenon. Hypothetical data are presented below for the amount of candy presented in a bowl for customers to take and the amount of candy taken by the end of each day:
a. Create a scatterplot of these data.
b. Describe your impression of the relation between these variables based on the scatterplot.
c. Compute the Pearson correlation coefficient for these data.
d. Summarize your findings using Cohen's guidelines.