1. Satisfaction A recent Gallup Poll asked a random 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 proportion 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
mean
SD
500
0.25
0.014
(a) Use the results of the simulation to approximate the margin of error for the
estimate of the proportion of undergrads at the large university who would
go to the professor.