Realtors of a particular county have undertaken a research study on residents of their country who are considering purchasing houses with the next 24 months. If the population proportion is assumed to...

Realtors of a particular county have undertaken a research study on residents of their country who are considering purchasing houses with the next 24 months. If the population proportion is assumed to be no more than 0.25, how many residents must be included in a simple random sample if the realtors want to be 99% confident that the maximum likely error will be no more than 0.015?