investigate questionnaire design principles, including simple language, unambiguous questions, consideration of number of choices, issues of privacy and ethics, and freedom from bias [complex]
2.3.4.1
describe the faults in the process of collecting data
2.3.4.2
describe sources of error in surveys, including sampling error and measurement error
2.3.4.4
investigate errors and misrepresentation in surveys, including examples of media misrepresentations of surveys [complex]
