NCERT Class11 Economics Statistics for Economics Chapter 2 Ans in EM| Chapter 2- Collection of Data

                                                                       Chapter2; Collection of Data

EXERCISES

1. Frame at least four appropriate multiple-choice options for following questions:

(i) Which of the following is the most important when you buy a new dress?

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(ii) How often do you use computers?

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(iii) Which of the newspapers do you read regularly?

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(iv) Rise in the price of petrol is justified.

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(v) What is the monthly income of your family?

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 2. Frame five two-way questions (with ‘Yes’ or ‘No’).

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 3. State whether the following statements are True or False.

(i) There are many sources of data.

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(ii) Telephone survey is the most suitable method of collecting data, when the population is literate and spread over a large area.

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(iii) Data collected by investigator is called the secondary data.

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(iv) There is a certain bias involved in the non-random selection of

samples.

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(v) Non-sampling errors can be minimised by taking large samples.

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 4. What do you think about the following questions? Do you find any problem with these questions? Describe.

(i) How far do you live from the closest market?

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(ii) If plastic bags are only 5 per cent of our garbage, should it be banned?

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(iii) Wouldn’t you be opposed to increase in price of petrol?

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(iv) Do you agree with the use of chemical fertilisers?

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(v) Do you use fertilisers in your fields?

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(vi) What is the yield per hectare in your field?

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 5. 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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 6. 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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 7. Give two examples each of sample, population and variable.

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 8. Which of the following methods give better results and why?

(a) Census (b) Sample

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 9. Which of the following errors is more serious and why?

(a) Sampling error (b) Non-Sampling error

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10. 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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11. Discuss how you would use the lottery method to select 3 students out of 10 in your class.

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12. Does the lottery method always give you a random sample? Explain.

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13. 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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14. Do samples provide better results than surveys? Give reasons for your answer.

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Post ID: DABP007163