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Chapter Analysis
Intermediate12 pages • EnglishQuick Summary
The chapter 'Collection of Data' in Class 11 Economics focuses on how data is collected for statistical analysis. It explains the difference between primary and secondary data sources, discusses methods of data collection such as surveys and interviews, and examines the importance of sampling. The chapter also covers the difference between Census and Sample Surveys and introduces concepts of sampling and non-sampling errors.
Key Topics
- •Sources of Data
- •Primary and Secondary Data
- •Methods of Data Collection
- •Sampling Techniques
- •Census vs Sample Surveys
- •Sampling and Non-sampling Errors
Learning Objectives
- ✓Understand the purpose of data collection in economics.
- ✓Distinguish between the sources of primary and secondary data.
- ✓Learn various methods of data collection including surveys and interviews.
- ✓Identify different types of sampling methods.
- ✓Differentiate between Census and Sample Surveys.
- ✓Recognize and minimize errors in data collection.
Questions in Chapter
Frame at least four appropriate multiple-choice options for the following questions: Which of the following is the most important when you buy a new dress?
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Frame five two-way questions (with ‘Yes’ or ‘No’).
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State whether the following statements are True or False: There are many sources of data.
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What do you think about the following questions? Do you find any problem with these questions? Describe.
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You want to do a research on the popularity of Vegetable Atta Noodles among children. Design a suitable questionnaire for collecting this information.
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In a village of 200 farms, a study was conducted to find the cropping pattern. Out of the 50 farms surveyed, 50% grew only wheat. What is the population and the sample size?
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Give two examples each of sample, population and variable.
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Which of the following methods give better results and why? (a) Census (b) Sample
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Which of the following errors is more serious and why? (a) Sampling error (b) Non-Sampling error
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Suppose there are 10 students in your class. You want to select three out of them. How many samples are possible?
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Discuss how you would use the lottery method to select 3 students out of 10 in your class.
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Does the lottery method always give you a random sample? Explain.
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Explain the procedure for selecting a random sample of 3 students out of 10 in your class by using random number tables.
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Do samples provide better results than surveys? Give reasons for your answer.
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Additional Practice Questions
Why is data collection important in economics?
mediumAnswer: Data collection is crucial in economics as it provides the necessary information to analyze economic problems and devise solutions. It helps in understanding trends, making forecasts, and formulating policies.
Distinguish between primary and secondary data with examples.
mediumAnswer: Primary data is collected first-hand through surveys or experiments, such as a survey on consumer habits. Secondary data is collected by someone else and used for analysis, like census data used by researchers for economic studies.
Describe the advantages of using a sample survey over a census.
mediumAnswer: Sample surveys are less time-consuming and expensive compared to a census. They require fewer resources and manpower and can provide reliable information if the sample is representative of the population.
Explain how sampling errors can occur and how they can be minimized.
mediumAnswer: Sampling errors occur when a sample does not represent the population accurately. They can be minimized by increasing the sample size or using random sampling methods to ensure every member of the population has an equal chance of selection.
What is the difference between random sampling and non-random sampling?
hardAnswer: In random sampling, every individual has an equal chance of being selected, reducing bias. Non-random sampling involves subjective selection, which can introduce bias as not all individuals have an equal chance of selection.