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'?
Question: 50 people are asked to respond to a question with the answers Yes/No/Don't know on two occasions. On the first occasion, the responses were 15/25/10 and on the second 18/26/6.
What is the change in the number of positive responses as a percentage of the whole sample?