Prob Stats Unit 1&2 Review

What is a population?

• A tool used to collect statistical data

• Statistics collected from an entire population

• All the people or objects on which data is collected

• A group chosen from a population

What is a census?

• A tool used to collect statistical data
• Statistics collected from an entire population
• The factual information collected from a survey or other source 
• A group chosen from a population

What is a survey?

• process of collecting statistical data from a small group of a population

• Statistics collected from an entire population

• An element or feature that can vary

• A person chosen from a population

What is statistics?

• The science of collecting and analysing data

• Statistics collected from an entire population

• An element or feature that can vary

• A group chosen from a population

What is data?

• The practise of collecting and analysing data
• The factual information collected from a survey or other source 
• An element or feature that can vary
• A group chosen from a population

What is a sample?

• A tool used to collect statistical data

• Statistics collected from an entire population

• The factual information collected from a survey or other source

• A subgroup chosen from a population

Questioning students as they leave a university library, a researcher asks 358 students about their drinking habits.

This is what type of sample?

• cluster

• convenience

• systematic

• stratified

Chosen at random, 580 customers at a car dealership are contacted and asked their opinions of the service they received.
This is what type of sample?

• convenience
• stratified
• simple random sample
• cluster

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.
This is a form of:

• Cluster Sampling
• Systematic Sampling
• Stratified Sampling
• Simple Random Sampling

A/an __________________ is a fake treatment given to the Control Group so that its members can't figure out that they're in the Control Group.

• placebo
• survey
• dummy variable
• false positive