Bigger bag Suppose the class in Exercise 12 buys bigger bags of candy, with 200 M&Ms each. Again the students calculate the proportion of green candies they find. a) Explain why its appropriate to use a Normal model to describe the distribution of the proportion of green M&Ms they might expect. b) Use the 689599.7 Rule to describe how this proportion might vary from bag to bag. c) How would this model change if the bags contained even more candies?

● Wha t is central ncy ○ The textbook definition words it as a statistical measure that attempts to determine the single value that is most typical or most representative of the entire set of scores ○ A simpler definition: the center of most common number of a distribution ● What does central tendency look like ○ The central tendency is usually understood as the mean, median, or mode ■ The mean is the center of gravity or the average out of all the scores ■ You can find the mean by simply adding up all of the numbers in the distribution and dividing by the number of scores ■ Algebraically, the population (or distribution) mean can be written