3. Measures of Central Tendency
a. The shape height and width of a population's distribution curve are quantified through its measures of central tendency.
1) The mean is the arithmetic average of a set of numbers.
2) The median is the middle value if data are arranged in numerical order. Thus, half the values are smaller than the median, and half are larger. It is the 50th percentile.
3) The mode is the most frequently occurring value. If all values are unique, no mode exists.