Constructing Confidence Intervals of Population Proportions

A simple random sample of 730 registered voters shows that 65% of the registered voters favor raising taxes to pay for state parks. A 98% confidence interval for the true proportion of voters who will vote in favor or raising taxes is to be constructed. Which type of confidence interval should you choose?

• Proportion Z interval

• sample z interval for a mean

• sample t interval for a mean

Tags

CCSS.HSS.IC.B.4

CCSS.HSS.IC.A.1

• z-interval for slope

• one-sample z-interval for μ

• one-sample z-interval for p

Which of the following is the confidence interval for the response "Bus?" (HINT: use Margin of Error)

• (17.9, 24.1)

• (18, 24)

• (18, 36)

• (17, 24)

Tags

CCSS.HSS.IC.B.4

If 1757 represents "yes" voters out of 2584, construct a 95% confidence interval for the "no" group.

• [.662,.698]

• [.298,.342]

• [.302,.338]

• [.288,.352]

If 827 represents "no" voters out of 2584, construct a 95% confidence interval for the "no" group.

• [.300,.340]

• [.298,.342]

• [.302,.338]

• [.288,.352]

Tags

CCSS.HSS.IC.B.4

• standardized test statistic

• confidence interval

• population

• slope

In a survey of 2480 golfers, 15% said they were left-handed.  The survey's margin of error was 3%.  Construct a confidence interval for the proportion of left-handed golfers.

• (0.18, 0.21)

• (0.12, 0.18)

• (0.12, 0.15)

• (0.11, ).19)

• z-interval for slope

• one-sample z-interval for μ

• one-sample z-interval for p

9 out of 25 students bring their lunch to school. Construct a 90% Confidence Interval for the proportion of students who bring their lunch to school. What is the value of p?

• p = 9

• p = .36

• p = 2.78

• p = .64

Tags

CCSS.HSS.IC.B.4

In a simple random sample of 482 lawyers, 136 had tried a case in court. A 80% confidence interval for the true proportion of voters who will vote in favor or raising taxes is to be constructed. Which type of confidence interval should you choose?

• z interval

• 1 sample t interval for a mean

• 1-Proportion Z interval

Tags

CCSS.HSS.IC.B.4