The goal of a survey is to collect data from a representative sample of a population to draw conclusions about that larger population. For the questionnaire to be considered reliable, people in the sa...The goal of a survey is to collect data from a representative sample of a population to draw conclusions about that larger population. For the questionnaire to be considered reliable, people in the sample do not have to score identically on each test, but rather their position in the score distribution should be similar for both the test and the retest.
