How Data is Collected

Data collection is the first step in any statistical investigation. It's all about gathering information in a way that is accurate and unbiased.

Methods of Data Collection

• Surveys: Asking people questions, like polling students on their favorite school subject.
• Experiments: Conducting controlled tests, such as growing plants under different lights.
• Observations: Watching and recording behaviors, like counting cars passing a street corner.
• Existing Sources: Using data already collected by others, such as government databases.

Good Data Collection Practices

• Ask clear, unbiased questions.
• Use random sampling to avoid favoritism.
• Record information carefully.

Why It Matters

The quality of your data affects every step of your analysis. Bad data means unreliable results!