Final answer:
Determining the exact number of people surveyed from a given margin of error alone is not possible without additional information. A typical sample size of 1,500 results in a margin of error of around 2.6 percent; hence, a margin of error of 3.5 percent suggests a slightly smaller sample size, but the precise number is undetermined.
Step-by-step explanation:
The question you've asked pertains to determining the sample size for a survey given a certain margin of error. The margin of error represents the range within which the true value lies with a specified level of confidence. For example, a sampling error of ±3 percent indicates that the actual value may be 3 percent higher or lower than the reported value from the survey results.
To calculate the number of people surveyed, we need more information than just the margin of error, such as the level of confidence and the population variance. However, research indicates that a typical sample size of 1,500 people results in an acceptable margin of error of approximately 2.6 percent.