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:
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. | |
Pie Chart | |
A circle divided into wedges where each wedge represents a portion of a population. | |
Bar Chart | |
A set of adjacent rectangles where the height or width of each rectangle represents a quantity. | |
Histogram | |
A set of adjacent, vertical rectangles where the hieght of each rectangle represents a quantity in a data range. | |
Scatter Plot | |
An x-y graph with various points plotted and a least squares fit line. |
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