Question

1)

Ms. Maria is considering running for mayor for Bear Gulch.  Before completing the petitions, she conducted a survey of voters in Bear Gulch. A sample of 500 voters reveals 400 would support her in the upcoming election.

What is the 95% confidence interval?

	a.	[0.0700,0.0900]
	b.	[0.0844,0.1156]
	c.	[0.07556,0.1244]
	d.	[0.0814,0.1186]

2)

The estimate of the population proportion should be within plus or minus 0.05 with a 99% confidence level. The best estimate for the population is 0.42.  

How large a sample size is required?

	a.	375
	b.	647
	c.	646
	d.	264

Answer 1