The Illinois State Toll Highway Authority is conducting a study to estimate the mean one-way distance to work for likely toll-road commuters. The study researcher desires a 3-mile margin of error at 90% confidence. The population standard deviation is unknown, so a best guess is used as the planning value for o. The highway authority estimates that the smallest distance to work in the population of low-income consumers is 3 miles, and the largest distance to work is 90 miles. A rough approximation of the population standard deviation is Use the Distributions tool to help to answer the question that follows. Select a Distribution Distributions 0 1 2/3 To satisfy the requirement for the margin of error, a sample size no smaller than is needed.

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The Illinois State Toll Highway Authority is conducting a study to estimate the mean one-way distance to work for likely toll-road commuters. The
study researcher desires a 3-mile margin of error at 90% confidence.
The population standard deviation is unknown, so a best guess is used as the planning value for o. The highway authority estimates that the smallest
distance to work in the population of low-income consumers is 3 miles, and the largest distance to work is 90 miles.
A rough approximation of the population standard deviation is
Use the Distributions tool to help to answer the question that follows.
Select a Distribution
Distributions
0 1 2/3
To satisfy the requirement for the margin of error, a sample size no smaller than
is needed.
Transcribed Image Text:The Illinois State Toll Highway Authority is conducting a study to estimate the mean one-way distance to work for likely toll-road commuters. The study researcher desires a 3-mile margin of error at 90% confidence. The population standard deviation is unknown, so a best guess is used as the planning value for o. The highway authority estimates that the smallest distance to work in the population of low-income consumers is 3 miles, and the largest distance to work is 90 miles. A rough approximation of the population standard deviation is Use the Distributions tool to help to answer the question that follows. Select a Distribution Distributions 0 1 2/3 To satisfy the requirement for the margin of error, a sample size no smaller than is needed.
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