Chapter 4: Sampling And Design

Question 1

Random selection of subjects from population gives us a sample that well represents population?

Answer 1

Yes

Question 2

Subjects invited to the sample w/o respect to grouping

Answer 2

Simple random sample

Question 3

Which sampling is this in practice?
List population
Assign members a #
Randomly generate sample size #s
Sample subjects that correspond to the selected #s

Answer 3

Simple random sample

Question 4

Select random starting point then invite subjects to the study at fixed intervals (every subject)

Answer 4

Systematic random sample

Question 5

Population divided into groups (strata); randomly select same # of subjects from every group

Answer 5

Stratified random sampling

Question 6

Population is divided into clusters then researchers randomly select some # of the group & all members of chosen groups are invited to the study

Answer 6

Cluster sampling

Question 7

Can be trouble if interval aligns with pattern in data

Answer 7

Systematic random sample

Question 8

Every group is guaranteed representation

Answer 8

Stratified random sampling

Question 9

When misapplied large secretion of population can be missed

Answer 9

Cluster sampling