of error for a sample of 500 from a large population is plus or minus 2.6 to 4.4 percentage
points. For example, if 90% of the 500 parents you survey report that the community needs more
after-school sports programs, between 87.4% and 92.6% of all parents in your area should
perceive a need for more after-school sports programs. There are a variety of ways communities
can employ probability sampling methods to contact potential survey respondents, depending on
the resources available to them.