\(E[X]=\mu\) \[\hat{\mu}=\frac{\sum_{i=1}^n x_i}{n}\]

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⚠️ What are the main sources of errors in Sampling Surveys? Answer: Errors in sample surveys arise mainly due to two broad causes —...

📋 What makes a good Sampling Frame, and why is it important? Answer: A sampling frame  is the complete list of all population units...

🧩 What are the key steps involved in designing a Sample Survey? Answer: Designing a good sample survey is a systematic process . Each...

📊 Why do we prefer Sampling in large-scale statistical investigations? Answer: Sampling is preferred in large-scale investigations...

🎯 What is the basic difference between a Census and a Sample Survey? Answer: A Census  is a complete enumeration of every individual or...

📉 If two different samples of the same size from a population give very different results, what might be the reason? Answer: This...

🧾 Q. Explain how you would conduct a Pilot Survey before final sampling. Answer: A Pilot Survey  (or Pre-test ) is a small-scale trial...

🏘️ In a village with 5 wards, you are to select 2 wards and then 10 households from each. What sampling design is this? Answer: This is...

🧠 Suppose you are asked to estimate the average household income in Delhi. Which sampling method would you use and why? Answer: To...

🧠 What is Multistage Sampling? Answer: Multistage Sampling  is an extension of cluster sampling where sampling is carried out in two or...

🏘️ What is Cluster Sampling? Answer: In Cluster Sampling , the population is divided into natural groups (clusters)  such as villages,...

🔢 Explain Systematic Sampling. Answer: In Systematic Sampling , units are selected at regular intervals  after a random start. If...

🧩 Define Stratified Sampling. Answer: In Stratified Random Sampling , the population is divided into homogeneous subgroups (strata)...

📊 Explain Simple Random Sampling (SRS). Answer: Simple Random Sampling (SRS)  is the most basic probability sampling technique in which...

🎯 What is Sampling Error? How does it differ from Non-Sampling Error? Answer: Sampling Error: It arises because only a part (sample) of...

🎯 Define ‘Sampling Frame’. Answer: A sampling frame  is the complete list or database of all units in the target population from which...

🎯 What are the Main Types of Sampling Methods? Answer: Sampling methods are broadly classified into two categories: A. Probability...

🎯 Why do we prefer Sampling over Complete Enumeration? Answer: Sampling is preferred because: Economical:  It saves time, money, and...