Statistics is a branch of mathematics which deals with the collection, organization and interpretation of numerical data.Data are not only narratively described but they are described numerically also. The three most basic types of summarization are:

Frequency distribution

Percent

Average

The frequency distributions can be represented in tables or as bar graphs. A pie chartis used in breaking the total group of people (total observations) into the percentage of the total represented by each category. Averages are often represented in tables or as graphs.

Under this heading, we discuss

Organizing qualitative numerical data

Organizing quantitative data

Qualitative data can be organized by drawing different graphs based on their category. Graphing of qualitative data can be done by:

Pie charts

Bar graph

Organizing quantitative data can be done in the following ways:

Statistical tables

Rank order

Frequency distribution

## Interpreting Numerical Data

Interpreting the numerical data can be done by

- Graphs and
- Numbers

Here, we discuss the different types of graphs and also the different forms of numbers.

## Predictions for Simple Probability Situations

A probability is a factor to determine the favorable situations in any task. It is generally represented in fractions; the fraction is number of favorable outcomes by number of total possible outcomes. The probability of any event is represented as P(E).

Probability of any event is:

P (E) = Number of favorable outcomes/Total possible outcomes.

The Probability of not occurring any event is P (E) = 1- P (E)