Question

In an election exit poll (N = 1,768), 898 respondents said they
voted for Candidate A. Is Candidate A going to win the election
(more than 50% of votes needed to win)? Use α = 0.1 for a
hypothesis testing. Questions 33 to 38 are based on this
example.

33. What’s the proportion of respondents in the poll voted for Candidate A?

34. What would be the H1 for the example?

A. The percentage of respondents in the poll voted for Candidate A
is different from 50%.

B. The proportion of all voters in the election who would vote for
Candidate A is more than 0.5.

C. The percentage of respondents in the poll voted for Candidate A
is different from 50.8%.

D. The proportion of all voters in the election who would vote for
Candidate A is more than 0.51.

35. What would be the Z critical value(s)?

36. What’s the standard error based on the sample information?

37. What is the Z obtained value?

38. What conclusion can we make for this
example?

Answer #1

In a recent poll, 134 registered voters who planned to
vote in the next election were asked if they would vote for a
particular candidate and 80 of these people responded that they
would. We wish to predict the proportion of people who will vote
for this candidate in the election.
a) Find a point estimator of the proportion who would vote for
this candidate.
b) Construct a 90% confidence interval for the true proportion
who would vote for this...

In a recent poll, 134 registered voters who planned to vote in
the next election were asked if they would vote for a particular
candidate and 80 of these people responded that they would. 1. 1.
We wish to predict the proportion of people who will vote for this
candidate in the election.
a) Find a point estimator of the proportion who would vote for
this candidate.
b) Construct a 90% confidence interval for the true proportion
who would vote...

A professional pollster takes an exit poll for an election of a
governor in Pennsylvania. Of the 1350 adults who voted in that
election, 670 say they voted for the Democratic candidate. We will
treat this exit poll as a random sample of all the people who voted
in that election.
1. What is the population?
a) The 1350 people who were surveyed
b) All adults in PA who voted in that election
c) All adults in PA
d) All...

A group conducted a poll of 2055 likely voters just prior to an
election. The results of the survey indicated that candidate A
would receive 45% of the popular vote and candidate B would
receive 43% of the popular vote. The margin of error was reported
to be 2%. The group reported that the race was too close to call.
Use the concept of a confidence interval to explain what this
means. What does it mean to say the race...

Excluding voters for third‑party candidates, approximately 52%
of the voters in Virginia's 2012 presidential election voted for
Barack Obama, with the other 48% voting for Mitt Romney. In modern
presidential politics, the vote in Virginia this year was not
particularly close. Obama fairly easily won more than 50% of the
votes, claiming Virginia's 13 electoral college votes.
Use the Statistical Applet: Confidence Intervals for Proportions
to simulate what might have happened in 25 pre‑election polls, with
each poll including a...

Only 13% of registered voters voted in the last election. Will
voter participation change for the upcoming election? Of the 306
randomly selected registered voters surveyed, 55 of them will vote
in the upcoming election. What can be concluded at the αα = 0.10
level of significance?
For this study, what sampling distribution would be used? Select
an answer -
Student's t distribution
binomial distribution
uniform distribution
standard normal distribution
The null and alternative hypotheses would be:
H0:
H1:
The...

Only 11% of registered voters voted in the last election. Will
voter participation change for the upcoming election? Of the 300
randomly selected registered voters surveyed, 48 of them will vote
in the upcoming election. What can be concluded at the αα = 0.01
level of significance?
For this study, we should use Select an answer z-test for a
population proportion t-test for a population mean
The null and alternative hypotheses would be:
H0:H0: ? μ p Select an answer =...

A)
According to the results of the 2004 presidential election, 50%
of New Yorkers voted for Kerry. Imagine the set of all possible
random samples of size 36 from all New Yorkers who voted. For each
sample of size 36, the value of the sample proportion is
the percentage of the people in the sample that voted for
Kerry.
What would the mean of all these sample
proportions be? Use 1 decimal places, for example, 0.1
B) What would the standard...

Only 12% of registered voters voted in the last election. Will
voter participation increase for the upcoming election? Of the 321
randomly selected registered voters surveyed, 51 of them will vote
in the upcoming election. What can be concluded at the αα = 0.10
level of significance?
For this study, we should use Select an answer z-test for a
population proportion t-test for a population mean
The null and alternative hypotheses would be:
H0:H0: ? p μ Select an answer ≠...

Only 16% of registered voters voted in the last election. Will
voter participation decline for the upcoming election? Of the 347
randomly selected registered voters surveyed, 45 of them will vote
in the upcoming election. What can be concluded at the αα = 0.05
level of significance?
For this study, we should use Select an answer z-test for a
population proportion t-test for a population mean
The null and alternative hypotheses would be:
H0:H0: ? μ p ? ≠ > <...

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