The mean, median, and mode.
The mean is the average of all the values in the data set. It is the sum of the values divided by the total number of data values in the set.
The median is the middle value when data are arranged from least to greatest. If it’s an odd number of values, it is the same as a data value. If it’s an even number of values, the median is equal to the sum of the 2 remaining values at the middle of the data set. Those two values divided by 2 gives you the median.
The mode is the value occurring most often in the data set. There can be no mode, one mode, or multiple modes. There’s more than one mode if each value occurs at the same frequency. Otherwise, the value with the greatest frequency is the mode.