Drill — Population, sampling & variables

23 practice questions on Population, sampling & variables, each with an explanation. The first 2 are free.

By subtopic

• Population and sample — sampling frame, accessible population and sample size 1 question
• Probability sampling — simple random, stratified, systematic and cluster 1 question
• Non-probability sampling — convenience, purposive, quota and snowball 1 question
• Sampling error and sampling bias — representativeness and selection bias 1 question
• Variables — independent, dependent, confounding and extraneous 1 question
• Hypothesis — null, alternative, directional and non-directional 1 question

Free today: the 10-question daily quiz · the NORCET 11 recall paper · what ₹999 unlocks — once, no auto-renewal.