Scribd
Upload
86 views2 pages

Collection of Data Question Bank

The document discusses the differences between primary and secondary data, highlighting that primary data is original and collected for a specific purpose, while secondary data is previously collected by others. It outlines two methods for collecting primary data: Direct Personal Investigation and Indirect Oral Investigation, and identifies sources of secondary data, including published and unpublished materials. Additionally, it describes the essentials of a good questionnaire and contrasts census and sample methods of data collection.

Uploaded by

iqrasheikh2420
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
86 views2 pages

Collection of Data Question Bank

The document discusses the differences between primary and secondary data, highlighting that primary data is original and collected for a specific purpose, while secondary data is previously collected by others. It outlines two methods for collecting primary data: Direct Personal Investigation and Indirect Oral Investigation, and identifies sources of secondary data, including published and unpublished materials. Additionally, it describes the essentials of a good questionnaire and contrasts census and sample methods of data collection.

Uploaded by

iqrasheikh2420
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 2

Chapter 2: Collection of Data - Question

Bank (Statistics Class 11)


Q1. What is the difference between primary data and secondary data?
Primary data refers to the data collected by the investigator for the first time for a
specific purpose. It is original and collected directly from the source. For example,
conducting a survey to know student preferences.

Secondary data refers to the data that has already been collected by someone else
and is used by the investigator. It is not original and can be found in reports, books,
websites, etc. For example, using government census data.

Q2. Explain two methods of collecting primary data.


1. Direct Personal Investigation: The investigator collects data personally from the
source. It is reliable but time-consuming and expensive.
2. Indirect Oral Investigation: Data is collected by interviewing third parties who are
expected to know the facts. Useful when data cannot be obtained directly.

Q3. Mention any two sources of secondary data.


1. Published sources like government reports, economic surveys, journals,
newspapers.
2. Unpublished sources such as internal records of firms, diaries, letters, etc.

Q4. What are the essentials of a good questionnaire?


A good questionnaire should:
1. Contain short and simple questions.
2. Be logically arranged.
3. Avoid personal or sensitive questions.
4. Include clear instructions.
5. Be pre-tested before final use.

Q5. Distinguish between census and sample methods of data collection.


Census Method:
- In this method, data is collected from every individual unit of the population.
- It gives accurate results but is time-consuming and costly.

Sample Method:
- Here, data is collected from a representative group (sample) of the population.
- It is economical and quicker but may involve sampling errors.

You might also like