For Questions , Use the Following Narrative

Essay

For Questions , use the following narrative
Narrative: cell phone owners
Suppose numerous random samples of size 2,500 are taken from a population made up of 20% cell phone owners.
-{Cell phone owners narrative} The chance of having at least 20% cell phone owners in a random sample from this population is 50%, no matter what size the sample is (as long as it is large enough for the Rule for Sample Proportions to apply).Why?