Final answer:
To ascertain if a sample is representative, questions should address the sampling method's randomness, methodology including margin of error, number of respondents, clarity of survey questions, and inclusion of diverse subgroups within the target population.
Step-by-step explanation:
To determine whether a sample is representative of the target group, several important questions need to be considered. First, consider whether the sampling method ensures that every individual in the target population has an equal chance of being selected, which is essential for a random sample. Questions like 'Was the entire population adequately defined?', 'Were the survey respondents selected in a way that reflects the diversity of the entire population?', and 'Did the sampling procedure avoid introducing bias?' help assess representativeness.
Additionally, for a survey to provide valid results, it is important to examine the survey's methodology. Look for factors such as the margin of error, the number of respondents, the currency of the data, clarity of the questions asked, and whether the survey was designed to avoid biases. Knowing these details helps to understand the survey's reliability and whether the sample can accurately reflect the beliefs or characteristics of the entire population.
In fields like elections or marketing research, assess if the sample includes relevant subgroups of the population. For example, if a poll aims to project election results, the sample should include respondents from various demographics and with a history of voting.