1. Satisfaction A recent Gallup Poll asked a random 206 sample of 1025 adults, In general,...
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1. Satisfaction A recent Gallup Poll asked a random 206 sample of 1025 adults, "In general, are you satisfied or dissatisfied with the way things are going in the United States at this time?" In all, 25% said that they were satisfied. The dotplot shows the propor tion who said they were satisfied in each of 500 random samples of size 1025 from a population where 25% are satisfied. 0.2 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 Simulated sample proportion who said satisfied Distribution of simulated proportion #samples 500 mean SD 0.25 0.014 (a) Use the results of the simulation to approximate the margin of error for Gallup's estimate of the pro- portion of U.S. adults who were satisfied with the way things were going in the United States at the time of the poll. (b) Interpret the margin of error. 1. Satisfaction A recent Gallup Poll asked a random 206 sample of 1025 adults, "In general, are you satisfied or dissatisfied with the way things are going in the United States at this time?" In all, 25% said that they were satisfied. The dotplot shows the propor tion who said they were satisfied in each of 500 random samples of size 1025 from a population where 25% are satisfied. 0.2 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 Simulated sample proportion who said satisfied Distribution of simulated proportion #samples 500 mean SD 0.25 0.014 (a) Use the results of the simulation to approximate the margin of error for Gallup's estimate of the pro- portion of U.S. adults who were satisfied with the way things were going in the United States at the time of the poll. (b) Interpret the margin of error.
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