What are statistics?

Statistics is the science that deals with the collection, classification, analysis, and interpretation of numerical facts or data through the use of mathematical theories of probability. It organizes the data collected and presents them in various forms.

Methods to obtain statistics

• Surveys/Questionnaires
• Observations

Types of statistics

Pictorial Statistics

Tables

Graphs and Charts

• Bar graphs
• Pie charts
• Line graphs

Diagrams

• Venn diagrams
• Stem and leaf diagrams
• Dot diagrams

Numerical Statistics

• Mean
• Median
• Mode
• Ratio