7TH GRADE MEASURES OF CENTRAL TENDENCY AND VARIABILITY. Quality content you can rely on!

7TH GRADE MEASURES OF CENTRAL TENDENCY
AND VARIABILITY.
Quality content you can rely on!
Mean - Answer: The average of the numbers in a data set.


To calculate:
1. Add up all of the data
2. Divide by the number of data in the data set.


Median - Answer: The middle number in a data set when in numerical order.


To calculate:
1. Place the numbers in order
2.Cross off on either side until you find the middle number.
**If there are 2 numbers in the middle, add them together and divide by 2 in order to find
the middle of those two numbers.**


Mode - Answer: The number that appears most often in a set of numbers.


*There is not always a mode.
*Sometimes there can be more than one mode.


Range - Answer: The difference between the lowest and highest values.


Measure of Central Tendency - Answer: A measure used to describe data. The mean,
median, and mode are measures of central tendency.


Measure of Variability - Answer: A measure of how the data is different from the
average.
Example: Range, Mean Absolute Deviation (MAD)

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