Glossary: Module 7
All informal definitions are based on
my own experience and knowledge
Term: Mean
Informal Definition:
The mean is the average of several numbers.
Formal Definition:
The mean is the average of the numbers: a calculated
“central” value of a set of numbers.
Definition from: mathisfun.com
Example of Mean:
Example from: quia.com
Term: Mode
Informal Definition:
The mode is the number that occurs the most.
Formal Definition:
The mode is the number that is repeated more often than
any other.
Definition from: purplemath.com
Example of Mode:
Example from: room17math.wikispaces.com
Term: Median
Informal Definition:
The median is the middle number in a set of numbers.
Formal Definition:
The median is the middle number (in a sorted list of numbers).
Half the numbers in the list are less, and half the numbers
are greater.
Definition from: mathisfun.com
Example of Median:
Example from: blogs.oregonstate.edu
Term: Range
Informal Definition:
The range is the difference between the highest
score to the lowest score.
Formal Definition:
The range is the difference between the largest and
smallest values.
Definition from: purplemath.com
Example of Range
Term: Frequency Distribution
Informal Definition
A frequency distribution is a way to organize
and display to identify relationships among
that data.
Formal Definition
A table that lists a set of scores and their frequency
(how many times each one occurs).
Definition from: mathisfun.com
Example of Frequency Distribution:
Example from: math.tutorvista.com
This Sums It Up. 
Jennifer,
I love the mean teacher finding an average!! Kids would love your images and the clear definitions you have included.
Great resource!!
Pat