Final answer:
An opinion poll investigates public views or judgements by questioning a representative sample of the population.
Step-by-step explanation:
The type of poll that investigates public views or judgements by questioning a representative sample is called an opinion poll.
Opinion polls aim to gather data on the public's opinions and attitudes towards certain topics or issues. These polls are designed to ensure that the sample, or group of people being surveyed, is representative of the overall population. By surveying a small representative sample, pollsters can make inferences or draw conclusions about the larger population.
For example, a polling company may conduct an opinion poll on the upcoming presidential election. They would contact a random and representative sample of voters to ask about their preferred candidate. The results of this poll can provide insights into the overall public opinion and help estimate the potential outcomes of the election.