Pronunciation: /stəˈtɪs.tɪks/ Explain
Statistics is the study of data. It includes
collection, analysis, interpretation and presentation of the data. Statistics
is useful in many areas of research, including biology, physics, marketing
research, and many others.
The two main branches of statistics are descriptive statistics and
inferrential statistics. Descriptive statistics describes the properties of
populations, such as age or distribution. Inferrential statistics is used to
make predictions of future events.
Some of the main elements of statistics are:
The entire group being studied. A statistical study identifies a population,
such as 20-35 year olds interested in fitness, and finds common properties
of the population.
The portion of the entire group that is surveyed is a sample. Getting a
a sample that fairly
the entire population, is important in designing a valid statistical
experiment. If a statisical study uses a
the study is invalid.
- Probability: The study of how likely
or how often something occurs. Probability theory is the mathematics
design: How an experiement (or study) is put together to make it valid.
Using a convenience sample is an example of poor experimental design.
- Regression: Finding an equation that best
describes the sample. Linear regression is
a regression that tries to find a line that fits the sample.
- Classification: Dividing a population into
various groupings. For example, a bank wants to lend money to those who
will pay it back. Potential customers are classified according to the
likelyhood that they will pay back the entire loan.
Statistics can be represented in a variety of ways. Some of the common ways are:
|Box and whisker plot|
||A line representing the first quartile, two boxes representing the 2nd and
3rd quartile, and a line representing the 4th quartile.|
||A circle divided into wedges where each wedge represents a portion
of a population.|
||A set of adjacent rectangles where
the height or width of each rectangle represents a quantity.
||A set of adjacent, vertical rectangles where the hieght of each
rectangle represents a quantity in a data range.|
||An x-y graph with various points plotted and a least squares
- McAdams, David E.. All Math Words Dictionary, statistics. 2nd Classroom edition 20150108-4799968. pg 171. Life is a Story Problem LLC. January 8, 2015. Buy the book
Cite this article as:
McAdams, David E. Statistics. 1/19/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/s/statistics.html.
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
5/5/2011: Initial version. (McAdams, David E.)