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Chapter 8: Q.3 (page 477)
Which distribution should you use for this problem?
The distribution is.
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Construct a confidence interval for the population mean time spent waiting. State the confidence interval, sketch the graph, and calculate the error bound .
A student polls his school to see if students in the school district are for or against the new legislation regarding school uniforms. She surveys students and finds that are against the new legislation.
a. Compute a % confidence interval for the true percent of students who are against the new legislation, and interpret the confidence interval.
b.In a sample of students,% said they own an iPod and a smartphone. Compute a % confidence interval for the true percent of students who own an iPod and a smartphone.
Fill in the blanks on the graph with the areas, upper and lower limits of the confidence interval, and the sample mean.
The 95% confidence interval is:__________________.
List two difficulties the company might have in obtaining random results, if this survey were done by email.
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