Mean, Median, and Mode
Summary of the Math: Mean, Median, and Mode
Read and Discuss
- Measures of Center
- Mean: A measure of center in a set of numerical data, computed by adding the values in a list and then dividing by the number of values in the list.
- Median: A measure of center in a set of numerical data. The median of a list of values is the value appearing at the center of a sorted version of the list—or the mean of the two central values, if the list contains an even number of values.
- Mode: A measure of center that occurs the most often in a data set.
- Measures of Spread
- Range: The difference between the extreme (least and greatest) values in a data set.
- Mean Absolute Deviation: A measure of variation in a set of numerical data, computed by adding the distances between each data value and the mean, then dividing by the number of data values.
- Outlier: A data value that is far from the rest of the data.
- Explain how the different measures of center are affected when data values are added or moved?
- Understand why the median and mean of a data set do not have to be data values, but why the mode, if it exists, will always be a data value?
- Describe or give an example of a data set for which the median is a better measure of what is typical than the mean?