For every collection of events Ai (i I ), show that iI Ai c = iI Ac i and iI Ai c = iI

● 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