Suppose the proportion X of surface area in a randomly selected quadrate that is covered by a certain plant has a standard beta distribution with 5 and 2. a. Compute E(X) and V(X). b. Compute P(X .2). c. Compute P(.2 X .4). d. What is the expected proportion of the sampling region not covered by the plant?

● 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