Sources of Error in Data

Question 1

Reducing sources of error

Answer 1

Random allocation, stratified random sampling, proportionate sampling, disproportionate sampling, snowball sampling

Question 2

Random Allocation

Answer 2

allocates participants into groups with an equal chance of being in either group

Question 3

Stratified Random Sampling

Answer 3

dividing participants into certain characteristics

Question 4

Placebo

Answer 4

an inactive substance used to determine the effectiveness of a drug

Question 5

Evaluation of research

Answer 5

Aims and significance of the work
Research method and design
Analysis and interpretation of the data
Discussion, implications and applications

Question 6

Aims and significance of the work

Answer 6

looks at the hypothesis, researchers, literature review, theoretical foundations of the research

Question 7

Research method and design

Answer 7

must be clear what type of study it is, has a testable hypothesis, ethical considerations

Question 8

Analysis and interpretation of the data

Answer 8

suitability of the analysis
results are feasible and realistic
Statistical significance levels

Question 9

Discussion, implication and applications of the research

Answer 9

should tie the initial research question and the results together, should include any weakness in the method that affects validity and reliability