Page 6 - statistical mathematics

typically only a part of the whole population, sample data provide only limited

information about the population. As a result, sample statistics are generally

imperfect representatives of the corresponding population parameters. the part

of statistics that draws conclusions from data (using some model for the data):

For example, inferential statistics involves selecting a model for the data,

checking whether the data fulfill the conditions of a particular model, and with

quantifying the involved uncertainty (e.g. using confidence intervals).

 Representation of Data

There are different ways to represent data such as through graphs, charts or

tables. The general representation of statistical data are:

 Bar Graph

A Bar Graph represents grouped data with rectangular bars with lengths

proportional to the values that they represent. The bars can be plotted

vertically or horizontally.

 Pie Chart
A type of graph in which a circle is divided into Sectors. Each of these

sectors represents a proportion of the whole.