Chapter 2: Collection of Data and Sampling Methods — Online MCQ Test
STATISTICS · CLASS 11th · Tamil Nadu State Board
Practice Chapter 2: Collection of Data and Sampling Methods with a free chapter-wise online MCQ test.
This chapter covers: Focusing on data collection techniques this chapter details census direct personal observation questionnaires and schedules. Students explore sampling methods probability sampling....
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Chapter 2: Collection of Data and Sampling Methods — Important Questions & Answers
What is a census method of data collection?
- A. Collecting data from every unit in the population
- B. Collecting data from only selected units
- C. Collecting data only from secondary sources
- D. Collecting data through graphs and charts
Answer: A. Collecting data from every unit in the population
In a census, information is obtained from every unit of the population. It gives complete coverage of the population.
In a census, information is obtained from every unit of the population. It gives complete coverage of the population.
Which method involves the investigator personally meeting the respondents and recording the data?
- A. Direct personal observation
- B. Questionnaire method
- C. Sample survey
- D. Schedule method
Answer: A. Direct personal observation
In direct personal observation, the investigator collects data by personally observing the units or respondents. This is a direct method of data collection.
In direct personal observation, the investigator collects data by personally observing the units or respondents. This is a direct method of data collection.
In a survey of students, the investigator selects every 10th student from an ordered list after choosing a random starting point. Which sampling method is used?
- A. Stratified sampling
- B. Systematic sampling
- C. Convenience sampling
- D. Cluster sampling
Answer: B. Systematic sampling
Selecting every k-th unit after a random start is systematic sampling. Here, every 10th student is chosen in a fixed pattern.
Selecting every k-th unit after a random start is systematic sampling. Here, every 10th student is chosen in a fixed pattern.
A town has 600 households. The investigator selects 60 households by choosing every 10th household after a random start. Which of the following is the main risk of this method?
- A. It may ignore the population completely
- B. It may become biased if the list has a hidden periodic pattern
- C. It cannot be applied to households
- D. It always gives the same sample as a census
Answer: B. It may become biased if the list has a hidden periodic pattern
In systematic sampling, bias can occur if the list is arranged with a repeating pattern related to the variable under study. Then the sample may not be representative.
In systematic sampling, bias can occur if the list is arranged with a repeating pattern related to the variable under study. Then the sample may not be representative.
In a village, households are arranged in groups by streets. The investigator first randomly chooses some streets and then surveys all households in the selected streets. Which sampling method is being used?
- A. Cluster sampling
- B. Systematic sampling
- C. Judgement sampling
- D. Quota sampling
Answer: A. Cluster sampling
When natural groups or clusters are selected first and all units within selected clusters are studied, it is cluster sampling. Here, streets act as clusters.
When natural groups or clusters are selected first and all units within selected clusters are studied, it is cluster sampling. Here, streets act as clusters.