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A sample proportion of 0.18 is found. To determine the margin of error for this statistic, a simulation of 100 trials is run, each with a sample size of 50 and a point estimate of 0.18.

The minimum sample proportion from the simulation is 0.28, and the maximum sample proportion from the simulation is 0.40.

What is the margin of error of the population proportion using an estimate of the standard deviation?

±0.02

±0.04

±0.12

±0.18

The results of a poll indicate that between 33% and 37% of the population of a town visit the library at least once a year.

What is the poll’s margin of error?

Enter your answer in the box.

±%

The results of a survey indicate that the true proportion of households who recycle paper products is likely in the interval (0.61,0.7).

What is the point estimate of the proportion of households who recycle paper?

Enter your answer, as a decimal, in the box.



Based on a poll of 200 citizens, a community action group claims that 40% of the population is in favor of a curfew for children under 18 on weekday nights. A local parent group claims that the poll is not valid and that only 22% of the citizens favor a curfew.

To determine whether this sample supports the population proportion of 0.40, a simulation of 100 trials is run, each with a sample size of 50 and a point estimate of 0.22. The minimum sample proportion from the simulation is 0.15, and the maximum sample proportion from the simulation is 0.27.

The margin of error of the population proportion is found using an estimate of the standard deviation.

What is the interval estimate of the true population proportion?

(0.06,0.38)

(0.14,0.30)

(0.16,0.28)

(0.18,0.26)

A recent poll taken by the movie theatre industry shows that 28% of the population attends a movie in a theater at least once a month. A sample of 300 people shows that only 12% of people attends a movie in a theater at least once a month.

To determine whether this sample supports the population proportion of 0.28, a simulation of 100 trials is run, each with a sample size of 200 and a point estimate of 0.12. The minimum sample proportion from the simulation is 0.10, and the maximum sample proportion from the simulation is 0.28.

What is the margin of error of the population proportion using half the range?

±0.03

±0.05

±0.07

±0.09