A candidate for political office commissioned a poll. His staff received
responses from 900 likely voters and 55% of them said they would vote for the candidate. The
staff then conducted a simulation of 1000 more polls of 900 voters, assuming that 55% of voters would
vote for their candidate. The output of the simulation is shown in the diagram
below.
Given this output,
and assuming a 95% confidence level, the margin of error for the poll is closest to