The most common measures of central tendency are the arithmetic mean, the median and the mode. A central tendency can be calculated for either a finite set of values or for a theoretical distribution, such as the normal distribution. Occasionally authors use central tendency to denote "the tendency of quantitative data to cluster around some central value."

Answer this question based on the passage: mean mode and median are measures of what? Let's have some stream of consciousness first.
To answer the above question, the relevant sentence is: The most common measures of central tendency are the arithmetic mean, the median and the mode. So, the answer is central tendency.