1. The two properties about a set of measurements of a dependent variable that we are most interested in describing are a. frequency and average. b. average and correlation. c. central tendency and dispersion. d. histograms and polygons. 2. The is the sum of all the scores divided by the number of scores. a. median b. mean c. mode d. standard deviation 3. The generally preferred measure of central tendency is usually the a. range. b. mean. C. standard deviation. d. median. e. standard score