Statistics: Collection of Data

Topics in this chapter

• Primary and Secondary Data
• Census and Sample Surveys
• Primary Data Collection Methods
• Questionnaires and Schedules
• Survey Errors and Data Quality

Cheat sheet

Practice questions

1. Question 1Q-FE04ED

   A researcher personally asks 200 households about their monthly expenditure and records the responses. The information collected is classified as:

   1. A.Primary data
   2. B.Secondary data
   3. C.Published data
   4. D.Census data only
   See the answer and solution
2. Question 2Q-5B5DE2

   Why must a sample selected for a sample survey be representative of the population?

   1. A.To ensure that every unit in the population is investigated
   2. B.To make the sample findings reasonably reliable for the whole population
   3. C.To eliminate the need for collecting data
   4. D.To make the survey identical to a census
   See the answer and solution
3. Question 3Q-4AB61D

   An investigator visits selected households, asks questions, and records the respondents' answers in a prepared form. Which method of collecting primary data is being used?

   1. A.Mailed questionnaire method
   2. B.Method of local correspondents
   3. C.Schedules through enumerators
   4. D.Indirect oral investigation
   See the answer and solution
4. Question 4Q-EA4415

   Distinguish between primary data and secondary data. Give one example of each.

   See the answer and solution
5. Question 5Q-9DC7CB

   Which statement correctly describes the census method of collecting data?

   1. A.Data are collected from every unit of the population
   2. B.Data are collected only from volunteers
   3. C.Data are obtained exclusively from published reports
   4. D.Data are collected from one randomly selected unit
   See the answer and solution