Study Guides/Economics/Primary and Secondary Data
Study Guide · Economics

Primary Data vs Secondary Data (Statistics)

In Class 11 Statistics for Economics, the very first step in any research or survey is the Collection of Data. Based on how it is collected, data is classified into two types: Primary Data and Secondary Data.

Question (Click to Flip)

What is primary and secondary data?

Answer

Primary data is original information collected for the first time by a researcher for a specific purpose. Secondary data is information that already exists, having been collected and published by someone else previously.

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Key Facts

Primary Data: First-hand, original information collected directly by the investigator.

Secondary Data: Second-hand information already collected and published by someone else.

Accuracy: Primary is more reliable and accurate than Secondary.

1. What is Primary Data?

Primary Data is data that is collected for the very first time, originally by the researcher themselves, for a specific purpose.

  • How is it collected?: Through direct personal interviews, sending out questionnaires, or conducting new experiments.
  • Pros & Cons: Because the researcher collects it personally, the data is highly accurate and perfectly matches the goal of the study. However, collecting it requires a lot of time, money, and effort.
  • Example: A student standing outside a mall asking 100 people what their favorite chocolate is.

2. What is Secondary Data?

Secondary Data is data that has already been collected by someone else in the past and is now being reused by the researcher.

  • How is it collected?: From published sources like government reports, newspapers, books, websites, or previous research papers.
  • Pros & Cons: It is extremely cheap and fast to acquire since you just have to look it up. However, it might be outdated, or not 100% relevant to your specific study.
  • Example: A student using the Government Census website to find out the population of their city.

Summary of Differences

  • Primary data is original (like a raw material); Secondary data is not original (like a finished product).
  • Primary data is expensive and slow; Secondary data is cheap and fast.

Questions and Answers

What is primary and secondary data?+

Primary data is original information collected for the first time by a researcher for a specific purpose. Secondary data is information that already exists, having been collected and published by someone else previously.

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