Time left 1:57:38 Which of the following best describes measures of center? O a. They are numbers that indicate the degree of asymmetry in a frequency distribution. O b. They are numbers that indicate the spread or scatter of observations and show the extent to which individual values in a data set differ from one another and, hence, differ from their central location. O c. They are numbers around which observations tend to cluster and that describe the location of what in some sense might be called the center of a data set. O d. All of the above. O e. None of the above