A large furniture retailer wants to conduct a customer satisfaction survey. Customers are divided into groups based on the amount of money they have spent at the retailer's stores in the past year: less than $2000, from $2000 to $3999.99, from $4000 to $8,000, or more than $8000. Management then randomly selects 200 customers from each group and sends them the survey. About 50 customers in each group responded to the survey.
What was the population of interest for the study?
The customers who responded to the survey
The customers who received the survey
All the customers of the furniture retailer
The management of the furniture retailer
Which sampling scheme was used in the retailer's study?
- Simple random sampling
- Convenience sampling
- Cluster sampling
- Stratified sampling
- Systematic sampling