Chapter 1 vocab

Question 1

Population

Answer 1

Whole set of items of interest

Question 2

Census

Answer 2

Observes every member of a population

Question 3

Sample

Answer 3

A selection of observations taken from a subset of the population which is used to find out information about the population as a whole

Question 4

Sampling units

Answer 4

Individual units of a population

Question 5

Sampling frame

Answer 5

A list of individually named/numbered sampling units

Question 6

Simple random sampling

Answer 6

Every sample of size n has an equal chance of being selected

Question 7

Systematic sampling

Answer 7

Elements chosen at regular intervals from an ordered list

Question 8

Stratified sampling

Answer 8

Population divided into mutually exclusive strata and a random sample is taken from each

Question 9

Quota sampling

Answer 9

A sample that represents the characteristics of the whole population is selected

Question 10

Opportunity sampling

Answer 10

Sample from people available at the time of the study and fitting the characteristics you look for