CH1 Sampling

A large company wants to administer a satisfaction survey to its current customers. Using their customer database, the company randomly selects 30 customers and asks them about their level of satisfaction with the company.
What type of sampling is being used?

• Random
• Systematic
• Stratified
• Cluster

To check the accuracy of a machine that is used for filling ice cream containers, every 20th bottle is selected and weighted.
What type of sampling is being used?

• Random
• Systematic
• Stratified
• Cluster

In a medical research study, a researcher selects a hospital and interviews all the patients that day.
What type of sampling is being used?

• Random
• Systematic
• Stratified
• Cluster

In a large school district, a researcher numbers all the full-time teachers and then randomly selects 30 teachers to be interviewed.
What type of sampling is being used?

• Random
• Systematic
• Stratified
• Cluster

To determine her blood pressure, Debra divides up her day into three parts: morning, afternoon, and evening. She then measures her blood pressure at 4 randomly selected times during each part of the day.
What type of sampling is being used?

• Random
• Systematic
• Stratified
• Cluster

Ten counties in Pennsylvania are randomly selected to determine the average county real estate tax that the residents pay.
What type of sampling is being used?

• Random
• Systematic
• Stratified
• Cluster