Question

In a recent poll 1040randomly selected adults were asked whether they approve of labor unions;66% said yes. In 1936, about 69% of adults approved of labor unions. Perform a significance testto determine if the data provide sufficient evidence to conclude that the percentage of adults who approve of labor unions has decreased since 1936? a) State Ho, Ha, and whether the test is two-tailed, left-tailed, or right-tailed.b) Calculate the test statistic.(Round your answer to the hundredths place.)c) Calculate the p-value.(Round your answer to the thousandths place.)d) At the 1%significance level, state your conclusion: “Reject Ho” or “Do Not Reject Ho”e) Interpret your conclusion.

Answer #1

In a recent poll of 745 randomly selected adults, 586 said that
it is morally wrong to not report all income on tax returns. Use a
0.01 significance level to test the claim that 75% of adults say
that it is morally wrong to not report all income on tax returns.
Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion about the null hypothesis, and
final conclusion that addresses the original claim. Use the
P-value method. Use the normal...

Leisure Time: In a Gallup poll, 1200 adults were randomly
selected and asked if they were satisfied or dissatisfied with the
amount of leisure time that they had. Of this Sample 690 said that
they were satisfied and 510 said they were dissatisfied. Use a 0.01
significance level to test the claim that less than 60% of adults
are satisfied with the amount of leisure time that they have.
What is the p-value and the test statistic?
Do we reject...

A poll of 1350 adults
in the United States asked how much confidence they had in banks. A
total of 203 adults said they had a great deal of confidence. An
economist claims that less than 15% of U.S. adults have a great
deal of confidence in banks. Can you conclude that the economist's
claim is true? Use the α = 0.01 level of significance.
Fill in the blanks
State the null and
alternative hypothesis
Ho:
H1:
The test statistics...

A poll of 2,061 randomly selected adults showed that 97% of them
own cell phones. The technology display below results from a test
of the claim that 94% of adults own cell phones. Use the normal
distribution as an approximation to the binomial distribution, and
assume a 0.01 significance level to complete parts (a) through (e).
Show your work. ***Correct answers are in BOLD (how do we
get those answers)
Test of p=0.94 vs p≠0.94
X= 1989, N= 2061, Sample...

Assume that adults were randomly selected for a poll. They were
asked if they "favor or oppose using federal tax dollars to fund
medical research using stem cells obtained from human embryos." Of
those polled, 481 were in favor, 397 were opposed, and 120 were
unsure. A politician claims that people don't really understand
the stem cell issue and their responses to such questions are
random responses equivalent to a coin toss. Exclude the 120
subjects who said that they...

In a recent poll, 801 adults were asked to identify their
favorite seat when they fly, and 476 of them chose a window seat.
Use a 0.05 significance level to test the claim that the majority
of adults prefer window seats when they fly. Identify the null
hypothesis, alternative hypothesis, test statistic, P-value,
conclusion about the null hypothesis, and final conclusion that
addresses the original claim. Use the P-value method and the
normal distribution as an approximation to the binomial...

In 2013, the Gallup Poll asked 1031 U.S. adults whether they
believed that people should pay sales tax on items purchased over
the internet. Of these, 443 said they supported such a tax. Does
the survey provide convincing evidence that less than 45% of U.S.
adults favor an internet sales tax? Use the α=0.05 level of
significance and the P-value method with the TI-84 Plus
calculator.
a. state null and alternative hypothesis. what tail is the
hypothesis test?
b. Compute...

A poll of 2,133 randomly selected adults showed that 94% of
them own cell phones. The technology display below results from a
test of the claim that 92% of adults own cell phones. Use the
normal distribution as an approximation to the binomial
distribution, and assume a 0.01
significance level to complete parts (a) through (e).
Test
of
pequals
0.92vs
pnot equals
0.92
Sample
X
N
Sample p
95% CI
Z-Value
P-Value
1
1996
2 comma 133
0.935771
(0.922098,0.949444
)...

Assume that adults were randomly selected for a poll. They were
asked if they "favor or oppose using federal tax dollars to fund
medical research using stem cells obtained from human embryos." Of
those polled, 486 were in favor, 397 were opposed, and 118 were
unsure. A politician claims that people don't really understand the
stem cell issue and their responses to such questions are random
responses equivalent to a coin toss. Exclude the 118 subjects who
said that they...

1)
6.42 Evolution versus Creationism: A Gallup
Poll released in December 2010 asked 1019 adults living in the
Continental U.S. about their belief in the origin of humans. These
results, along with results from a more comprehensive poll from
2001 (that we will assume to be exactly accurate), are summarized
in the table below:
Response
Year: 2010
Year: 2001
Humans Evolved with God guiding (1)
38%
37%
Humans evolved but God had no part in the process (2)
16%
12%...

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