Class 11 Statistics: Collection of Data
Chapter 3: Collection of Data — learn the meaning of statistical enquiry, primary and secondary data, methods of collecting primary data, questionnaire construction, census and sampling methods, and the role of the Census of India and NSSO. CBSE Class 11 Statistics notes covering 10 topics: Statistical Enquiry and Sources of Data, Primary and Secondary Data, Methods of Collecting Primary Data, Construction of Questionnaire, Census and Sampling Methods, Random Sampling Methods, Non-Random Sampling Methods, Principles of Sampling and Statistical Errors, Sources and Precautions of Secondary Data, and Census of India and NSSO.
Topics(10)
Statistical Enquiry and Sources of Data
Meaning of statistical enquiry, important terms, internal/external sources. CBSE Class 11 Statistics notes
Primary and Secondary Data
Meaning, sources, comparison, degree-based distinction. CBSE Class 11 Statistics notes
Methods of Collecting Primary Data
Six primary data collection methods. CBSE Class 11 Statistics notes
Construction of Questionnaire
Principles of questionnaire design, types of questions. CBSE Class 11 Statistics notes
Census and Sampling Methods
Census vs sampling, factors affecting sample size. CBSE Class 11 Statistics notes
Random Sampling Methods
Simple random, systematic, stratified, cluster sampling. CBSE Class 11 Statistics notes
Non-Random Sampling Methods
Convenience, purposive, quota, snowball sampling. CBSE Class 11 Statistics notes
Principles of Sampling and Statistical Errors
Principles of sampling, sampling vs non-sampling errors. CBSE Class 11 Statistics notes
Sources and Precautions of Secondary Data
Published and unpublished sources, precautions. CBSE Class 11 Statistics notes
Census of India and NSSO
Census of India and role of NSSO in data collection. CBSE Class 11 Statistics notes