10 random samples of 20 people each are used to determine the proportion of people who support the local soccer team over other soccer teams in the league. The proportions for the samples are 0.85 0.70 0.75 0.80 0.65 0.80 0.60 0.75 0.85 0.75 What does the proportion 0.85 mean for the first sample? The mean of the sample proportions is 0.75 and the standard deviation is 0.08. What margin of error should be used for the estimate of the population proportion?