1. The sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.525.
The sample statistic suggests that we might expect 4515 of the 8600 registered voters to vote for Brown.
How do we find the sample proportion of the surveyed voters who voted for brown?
Out of 400 randomly selected registered voters, 210 said they'd vote for Brown.
The sample proportion p for Brown is
p = 210/400 = 0.525
The sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.525.
Number of voters for Brown = 8600 × 0.525
Number of voters for Brown = 4515
The sample statistic suggests that we might expect approximately 4515 of the 8600 registered voters to vote for Brown.