Final answer:
An example of data not being representative of the population is when a survey only includes responses from people who voluntarily choose to respond, leading to bias. This type of sampling does not accurately reflect the entire population.
Step-by-step explanation:
An example where data was presented on an issue, but the sample was not representative of the population it was drawn from is when a survey conducted about a certain issue only includes responses from people who voluntarily choose to respond. For instance, internet surveys are usually biased because people choose to respond or not. This means that the sample only represents a specific subset of the population who are more likely to have certain opinions or characteristics, resulting in data that may not accurately reflect the entire population.