A research team estimates that of adults in a certain region own a smartphone, with a margin of error of at a confidence level. Which of the following statements best describes what the margin of error means in this context?
There is a chance that the true percentage of smartphone owners is exactly .
If the survey were repeated many times, of the resulting confidence intervals would contain the true percentage of smartphone owners.
The actual percentage of smartphone owners in the region is guaranteed to be between and .
The margin of error accounts for errors made by respondents when answering the survey questions.
