NCERT Solutions for Class 12Statistics Chapter 2 Collection Of Data – Here are all the NCERT solutions for Class 11 Statistics Chapter 2. This solution contains questions, answers, images, explanations of the complete chapter 2 titled Collection Of Data taught in Class 11. If you are a student of Class 11 who is using NCERT Textbook to study Statistics, then you must come across chapter 2 Collection Of Data. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 11 Statistics Chapter 2 Collection Of Data.
NCERT Solutions Class 11 Statistics Chapter 2 Collection Of Data
Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Statistics for Class 11 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.
For a better understanding of this chapter, you should also see summary of Chapter 2 Collection Of Data , Statistics, Class 11.
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Collection Of Data
NCERT Solutions Class 11 Statistics chapter 2 Collection Of Data
Class 11, Statistics chapter 2, Collection Of Data solutions are given below in PDF format. You can view them online or download PDF file for future use.
Collection Of Data
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Question & Answer
Q.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? (ii) How often do you use computers? (iii) Which of the newspapers do you read regularly? (iv) Rise in the price of petrol is justified. (v) What is the monthly income of your family?
Ans : (i) (a) Colour (b) Price (c) Brand (d) Quality of cloth (ii) (a) Everyday (b) 6 times a week (c) 4 times a week (d) 2 times a week (iii) (a) The Times of India (b) The Hindu (c) Indian Express (d) Dainik Bhaskar (iv) (a) Because of increase in supply for petrol (b) Because of abundance of petrol (c) Because of hike in excise duty on petrol (d) Because of appreciation of rupee (v) (a) Less than Rs 30,000 (b) RS 30,000 to RS 50,000 (c) RS 50,000 to RS (d) More than Rs 1,00,000
Q.2: Frame five two-way questions (with ‘Yes’ or ‘No’).
Ans : 1. Do you have a car in your family? 2. Do you like economics? 3. Have you ever been out of your country? 4. Have you ever visited Taj Mahal? 5. Have to contribute towards Swaach Baharat Abhiyan?
Q.3: State whether the following statements are True or False. (i) There are many sources of data. (ii) Telephone survey is the most suitable method of collecting data, when the population is literate and spread over a large area. (iii) Data collected by investigator is called the secondary data. (iv) There is a certain bias involved in the non-random selection of samples. (v) Non-sampling errors can be minimised by taking large samples.
Ans : (i) True Reason: There are many sources of data collection which can be categories under two heads Primary data sources and secondary data sources. Primary data sources consists of Direct personal interviews, Indirect oral investigations, Information through mailed Questionnaire or Information through questionnaire filled by enumerators. The sources of secondary data includes published sources like books, magazine, government survey reports etc. and unpublished sources like research papers, company documents, etc. (ii) False Reason: Telephone survey is most suitable method of collecting data when population is illiterate. When population is literate and spread over a large area the most suitable method is mailed questionnaire method. (iii) False Reason: Data collected by the investigator himself is called primary data; the data collected by some other agency and which is already available for furthers studies are called secondary data. (iv) True Reason: Non-random sampling is done on the basis of judgement and convenience of the investigator hence it is not free of certain bias like personal prejudice. (v) False Reason: Non-sampling errors are more serious than sampling errors and it is difficult to minimize them, ever by taking a large sample. Some of the non-sampling errors are: errors in data Acquisition, non-response errors, sampling bias, processing errors, etc.
Q.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? (ii) If plastic bags are only 5 percent of our garbage, should it be banned? (iii) Wouldn’t you be opposed to increase in price of petrol? (iv) Do you agree with the use of chemical fertilisers? (v) Do you use fertilisers in your fields? (vi) What is the yield per hectare in your field?
Ans : (i) This question is quite ambiguous and respondent might find it difficult to answer it with certainty. (ii) This question is too long; it might discourage respondent to answer. It also gives a clue about how the respondent should answer which can influence the respondents answer, it should be avoided. (iii) This question contains double negatives. The questions starting with "wouldn’t you" or "don’t you" should be avoided as they may create confusion and lead to biased responses. (iv) (v) (vi) The above three questions (iv, v and vi) are correct but the order in which they have been asked is not correct. One should always ask the general questions first and then should move towards more specific ones. This helps the respondents to feel comfortable. The correct order to ask these questions would have been. i. What is the yield per hectare in your field? ii. Do you use fertilisers In your fields? iii. Do you agree with the use of chemical fertilisers?
Q.5: You want to do a research on the popularity of Vegetable Atta Noodles among children. Design a suitable questionnaire for collecting this information.
Ans : DIY
NCERT / CBSE Book for Class 11 Statistics
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All NCERT Solutions Class 11
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