TEST 4 (PART 1)

A researcher wants to study the opinions of residents in a city. They randomly select several neighborhoods and interview all the residents in each selected neighborhood. What sampling method is being used?

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

When a researcher collects data from a subset of individuals from a larger group, it is called:

• Census

• Parameter estimation

• Sample

• Hypothesis testing

A company wants to estimate the proportion of defective products in a large batch. They randomly select 100 products from the batch and inspect them for defects. What type of statistic is the estimated proportion of defective products?

• Descriptive statistic

• Inferential statistic

• Population parameter

• Sample parameter

What is a parameter in statistics?

• A descriptive measure of a sample

• A characteristic of the entire population

• A variable used to define a sample

• A value obtained through statistical inference

A marketing research firm wants to study the buying habits of consumers in a certain area. They decide to select every 10th customer who enters a specific store during business hours for a period of one week. Which sampling method is being employed in this scenario?

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling