Sampling Basics
What is the main goal of sampling?
To study a population without surveying everyone.
In which method does everyone have an equal chance of being chosen?
Simple Random Sampling
Picking 50 random students from the entire school — what method is this?
Simple Random Sampling
What does the Central Limit Theorem (CLT) say about sample means?
They form a normal (bell-shaped) distribution.
What pop star is known as the “Queen of Pop”?
Beyonce
What is the difference between a population and a sample?
Population = whole group; Sample = small part of it.
Which method selects every kth person on a list?
Systematic Sampling
Asking every 5th customer who enters a store — what method is this?
Systematic Sampling
Does the CLT work even if the original population is not normal?
Yes, it does!
In what horror movie does the killer wear a white mask and call victims on the phone?
Scream
Why is sampling useful in business?
It saves time, reduces cost, and helps make faster decisions.
What is the purpose of stratified sampling?
To ensure all subgroups are represented.
Dividing a company by department and picking people from each — what method is this?
Stratified Sampling
What is the minimum sample size usually needed for the CLT to work well?
About 30 samples (n ≥ 30).
What is the stage name of Benito Antonio Martínez Ocasio?
Bad Bunny
What happens if your sample is not representative of the population?
You get biased or inaccurate results.
What is cluster sampling?
Dividing into clusters and studying everyone in some clusters.
Choosing 3 branches of a restaurant chain and surveying all employees there — what method?
Cluster Sampling
Give a real-life example where CLT is used.
Polls, quality control, medicine, or economics.
Which country won the FIFA World Cup in 2022?
Argentina
What are the two main categories of sampling?
Probability and non-probability sampling.
Which sampling method is the fastest but also most biased?
Convenience Sampling
Asking your friends because they’re nearby — what method is this?
Convenience Sampling
Why is the CLT important in statistics?
It allows us to make predictions about populations using sample data.
What was the first song to reach 1 billion views on YouTube?
Gangnam Style by PSY