What is the name of the forecasting method whereby a panel of independent experts answer questionnaires in two or more rounds in order to converge on the correct answer?

 i)A 'longitudinal' survey is one where the same set of respondents complete the same survey on two or more occasions.

ii)A 'cross-sectional' survey is one where the same set of respondents complete different surveys on two or more occasions.

Which of the following statements is/are true?

 i)A 'longitudinal' survey is one where the same set of respondents complete the same survey on two or more occasions.

ii)A 'cross-sectional' survey is one where the same set of respondents complete different surveys on two or more occasions.

i)Small changes in the wording of a survey question can have a significant effect on respondents' answers.

ii)If the sample size for a survey is large enough, predictions about consumer behavior can, effectively, be made completely accurate.

Which of the following statements is/are true?

i)Small changes in the wording of a survey question can have a significant effect on respondents' answers.

ii)If the sample size for a survey is large enough, predictions about consumer behavior can, effectively, be made completely accurate.