Question: Which TWO of the following situations may cause 'response bias'?
i)Emotive language in a survey question
ii)Delay between designing a survey and using it
iii)Using a voluntary-response method that leads to respondents not being representative of the population
iv)Using qualitative rather than quantitative methods
Question: What is the name for the test that assesses whether the difference between the mean score for a sample and that of the population as a whole is 'statistically significant'?