3) A study which only observes and records data would be an "Observational Study"

	a.	TRUE
	b.	FALSE

4)The size of a relatively large population has an effect on the sample variability

	a.	TRUE
	b.	FALSE

5) The layers of a stratified sample are referred to "observational levels"

	a.	TRUE
	b.	FALSE

6) Two variables are said to be "confounded" when their effect on a response variable cannot be clearly distinguished from each other.

	a.	TRUE
	b.	FALSE

7) If one made a list of the Governors' salaries from each state, the list would be considered a "sample"

	a.	TRUE
	b.	FALSE

8) If a population size is large relative to the sample size, the precision of results will be the same whether the population size is 20,000 or 20 million

	a.	TRUE
	b.	FALSE

9) The entire group of objects which contain some characteristic of interest in a study

	a.	population
	b.	sample
	c.	parameter
	d.	statistic

10) The sampling process in which the sample members choose themselves to be in the sample, such as internet surveys

	a.	cluster
	b.	Stratified
	c.	Convenience
	d.	voluntary

11) When collecting data from people, members of a non-voluntary sample may refuse to provide the data. This is known as

	a.	Stratified
	b.	Non-Response
	c.	Convenience
	d.	Voluntary Response

12) Polls and surveys taken over the internet are statistically faulty in that the "data" (the people) choose whether or not they will be in the sample. This type of sample is

	a.	Stratified
	b.	Cluster
	c.	Convenience
	d.	Voluntary Response

13) This is a measurement of the variability one sees from sample to sample

	a.	simple random sampling
	b.	sampling variability
	c.	precision
	d.	bias

14) A sample that is collected from whatever data happens to quick and easy to get.

	a.	Voluntary response
	b.	Stratified
	c.	Convenience
	d.	Systematic

15) The individual objects from which data is collected in an experiment

	a.	samples
	b.	statistics
	c.	representatives
	d.	observational units

16) The sampling process in which the population is subdivided into categories, and then sampling occurs within each category.

	a.	cluster
	b.	Stratified
	c.	Convenience
	d.	Systematic