CBSE Class 11 Economics Chapter 2: Collection of Data NCERT Solutions

The task is to frame appropriate multiple-choice options for each given question. Here are suitable options:

1. Which of the following is the most important when you buy a new dress?

   1. Price
   2. Quality and Style
   3. Size
   4. Brand

2. How often do you use computers?

   1. Every day
   2. 5-6 times a week
   3. 3-4 times a week
   4. Less than 3 times a week

3. Which of the newspaper do you read regularly?

   1. The Hindu
   2. The Times of India
   3. The Economic Times
   4. Hindustan Times

4. Rise in the price of petrol is justified

   1. Because of an increase in the supply of petrol
   2. Because of the abundance of petrol
   3. Because of a hike in excise duty on petrol
   4. Because of the appreciation of the rupee

5. What is the monthly income of your family?

   1. Less than Rs 30,000
   2. Rs 30,000 to Rs 50,000
   3. Rs 50,000 to Rs 1,00,000
   4. More than Rs 1,00,000

Two-way questions are those that can typically be answered with a simple 'Yes' or 'No'. Here are five examples:

1. Do you own a car in your family?
2. Do you find economics an interesting subject?
3. Have you ever traveled outside of India?
4. Have you ever visited the Taj Mahal?
5. Do you contribute to the Swachh Bharat Abhiyan?

1. True

   Reason: Data can be collected from various sources. These are broadly categorized into primary sources (like surveys, interviews) and secondary sources (like published reports, books, articles). Each category offers multiple methods for data acquisition.

2. False

   Reason: While telephone surveys can be efficient for reaching a large area, they are not always the most suitable method, especially if the population is not literate or if detailed, sensitive information is required. Other methods like mailed questionnaires or personal interviews might be more appropriate depending on the context.

3. False

   Reason: Data collected directly by an investigator for their specific purpose is called primary data. Data collected by someone else and used by the investigator is called secondary data.

4. True

   Reason: Non-random sampling methods, where the selection of units is not based on probability, often introduce bias because certain units may have a higher or lower chance of being selected, potentially skewing the results.

5. False

   Reason: Non-sampling errors arise from various factors like measurement errors, response errors, or processing errors. Increasing the sample size primarily helps in reducing sampling errors, not non-sampling errors. Minimizing non-sampling errors requires careful planning, training, and execution of the survey.