9-1, Mean, Median, and Mode (CCSS Mathematical Practices)
A measure of central tendency is a single value that summarizes how a set of data is centered. Mean, median, and mode are measures of central tendency.
The mean is the sum of the data values divided by the number of data items.
The median is the middle value when the data values are arranged in numerical order. For an even number of data values, the median is the mean of the two middle items.
The mode is the item with the greatest frequency. A data set may have no mode, one mode, or more than one mode.
The range of a set of data is the difference between the greatest and least values in the set. Range is a measure of how spread out the data in a set are.
If one data item is much higher or lower than the other data items, it is an outlier. Outliers can have a great effect on the mean of a set of data. They usually have very little effect on the median and mode.
The mean is the sum of the data values divided by the number of data items.
The median is the middle value when the data values are arranged in numerical order. For an even number of data values, the median is the mean of the two middle items.
The mode is the item with the greatest frequency. A data set may have no mode, one mode, or more than one mode.
The range of a set of data is the difference between the greatest and least values in the set. Range is a measure of how spread out the data in a set are.
If one data item is much higher or lower than the other data items, it is an outlier. Outliers can have a great effect on the mean of a set of data. They usually have very little effect on the median and mode.
What is Mean, Median, & Mode? (2:16)
Mean, Median, and Mode Rap (3:13)