Question

Trials in an experiment with a polygraph include 99 results that include 24 cases of wrong results and 75 cases of correct results. Use a .10 significance level to test the claim that such polygraph results are correct less than 80% of the time. 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 distribution as an approximation of the binomial distribution.

Answer #1

A recent broadcast of a television show had a15 ?share, meaning
that among 6000 6000 monitored households with TV sets in? use,15?%
of them were tuned to this program. Use a 0.01 significance level
to test the claim of an advertiser that among the households with
TV sets in? use, less than 25?% were tuned into the program.
Identify the null? hypothesis, alternative? hypothesis, test?
statistic, P-value, conclusion about the null? hypothesis, and
final conclusion that addresses the original claim....

In a recent poll,
805805
adults were asked to identify their favorite seat when
they fly, and
475
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
nullhypothesis, and final conclusion that addresses the original
claim. Use the P-value method and the normal distribution as
an approximation to the binomial distribution.

In a survey of 150 senior executives, 52% said that the most
common job interview mistake is to have little or no knowledge of
the company. Use a 0.01 significance level to test the claim that
in the population of all senior executives, 45% say that the most
common job interview mistake is to have little or no knowledge of
the company. Identify the null hypothesis, alternative hypothesis,
test statistic, P-value, conclusion about the null hypothesis, and
final conclusion that...

In a recent court case it was found that during a period of 11
years 867867 people were selected for grand jury duty and 4040% of
them were from the same ethnicity. Among the people eligible for
grand jury duty, 80.880.8% were of this ethnicity. Use a 0.010.01
significance level to test the claim that the selection process is
biased against allowing this ethnicity to sit on the grand jury.
Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion...

A survey of 61 comma 64961,649 people included several questions
about office relationships. Of the respondents, 26.926.9%
reported that bosses scream at employees. Use a 0.050.05
significance level to test the claim that more than 1 divided by
41/4 of people say that bosses scream at employees. How is the
conclusion affected after learning that the survey is an online
survey in which Internet users chose whether to respond? Identify
the null hypothesis, alternative hypothesis, test statistic,
P-value, conclusion about...

In a study of 420 comma 052 cell phone users, 136 subjects
developed cancer of the brain or nervous system. Test the claim of
a somewhat common belief that such cancers are affected by cell
phone use. That is, test the claim that cell phone users develop
cancer of the brain or nervous system at a rate that is different
from the rate of 0.0340% for people who do not use cell phones.
Because this issue has such great importance,...

A genetic experiment involving peas yielded one sample of
offspring consisting of
410410
green peas and
179179
yellow peas. Use a
0.050.05
significance level to test the claim that under the same
circumstances,
2727%
of offspring peas will be yellow. 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 distribution.
What are the...

For one binomial experiment, n1 = 75 binomial trials
produced r1 = 45 successes. For a second independent
binomial experiment, n2 = 100 binomial trials produced
r2 = 65 successes. At the 5% level of significance, test
the claim that the probabilities of success for the two binomial
experiments differ.
(a) Compute the pooled probability of success for the two
experiments. (Round your answer to three decimal places.)
(b) Compute p̂1 - p̂2.
p̂1 - p̂2 =
(c) Compute the...

Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion about the null hypothesis, and final
conclusion that addresses the original claim. The health of
employees is monitored by periodically weighing them in. A sample
of 54 employees has a mean weight of 183.9 lb. Assuming that ? is
known to be 121.2 lb, use a 0.10 significance level to test the
claim that the population mean of all such employees weights is
less than 200 lb.

A data set includes data from student evaluations of courses.
The summary statistics are n=84, xbar =3.42 s=0.56
Use a 0.01 significance level to test the claim that the
population of student course evaluations has a mean equal to
3.50.
Assume that a simple random sample has been selected. Identify
the null and alternative hypotheses, test statistic, P-value, and
state the final conclusion that addresses the original claim.
What are the null and alternative hypotheses?
Determine the test statistic.
Determine...

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