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1. Consider a drug that is used to help prevent blood clots in certain patients. In clinical trials, among
5798 patients treated with this drug,
157 developed the adverse reaction of nausea. Use a
0.10 significance level to test the claim that
3% of users develop nausea. Does nausea appear to be a problematic adverse reaction?
2.Suppose
221 subjects are treated with a drug that is used to treat pain and
55 of them developed nausea. Use a
0.01 significance level to test the claim that more than
20% of users develop nausea.
3.Consider a drug testing company that provides a test for marijuana usage. Among
326 tested subjects, results from
26 subjects were wrong (either a false positive or a false negative). Use a
0.10 significance level to test the claim that less than
10 percent of the test results are wrong.
4.A 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if
they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and
then she asked the therapists to identify the selected hand by placing their hand just under her hand
without seeing it and without touching it. Among
288 trials, the touch therapists were correct
118 times. Use a
0.01 significance level to test the claim that touch therapists use a method equivalent to random guesses.
Do the results suggest that touch therapists are effective?
5.In one study of smokers who tried to quit smoking with nicotine patch therapy,
36 were smoking one year after treatment and
35 were not smoking one year after the treatment. Use a
0.10 significance level to test the claim that among smokers who try to quit with nicotine patch therapy,
the majority are smoking one year after the treatment. Do these results suggest that the nicotine patch
therapy is not effective?
6. A data set includes data from student evaluations of courses. The summary statistics are n
=
85,
x
=
3.44, s
=
0.59. Use a
0.05 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.
7. In a test of the effectiveness of garlic for lowering cholesterol,
49 subjects were treated with raw garlic. Cholesterol levels were measured before and after the
treatment. The changes (before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of
0.4 and a standard deviation of
2.46. Use a
0.01 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is
greater than
0. What do the results suggest about the effectiveness of the garlic treatment? 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.
8. A data set lists earthquake depths. The summary statistics are n
=
500,
x
=
4.37 km, s
=
4.24 km. Use a
0.01 significance level to test the claim of a seismologist that these earthquakes are from a population
with a mean equal to
4.00. 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.
9. Listed below are the lead concentrations in
μg/g measured in different traditional medicines. Use a
0.01 significance level to test the claim that the mean lead concentration for all such medicines is less
than
16
μg/g. Assume that the sample is a simple random sample.
13.5 11 5.5 22.5 18 22 2.5 21.5 4.5 5
10. Assume that a simple random sample has been selected from a normally distributed population and
test the given claim. Identify the null and alternative hypotheses, test statistic, P-value, and state the final
conclusion that addresses the original claim.
A safety administration conducted crash tests of child booster seats for cars. Listed below are results from
those tests, with the measurements given in hic (standard head injury condition units). The safety
requirement is that the hic measurement should be less than 1000 hic. Use a
0.01 significance level to test the claim that the sample is from a population with a mean less than 1000
hic. Do the results suggest that all of the child booster seats meet the specified requirement?

Sample Answer

Compelling correspondence is essential to the achievement all things considered but since of the changing idea of the present working environments, successful correspondence turns out to be more troublesome, and because of the numerous impediments that will permit beneficiaries to acknowledge the plan of the sender It is restricted. Misguided judgments.In spite of the fact that correspondence inside the association is rarely completely open, numerous straightforward arrangements can be executed to advance the effect of these hindrances.

Concerning specific contextual analysis, two significant correspondence standards, correspondence channel determination and commotion are self-evident. This course presents the standards of correspondence, the act of general correspondence, and different speculations to all the more likely comprehend the correspondence exchanges experienced in regular daily existence. The standards and practices that you learn in this course give the premise to additionally learning and correspondence.

This course starts with an outline of the correspondence cycle, the method of reasoning and hypothesis. In resulting modules of the course, we will look at explicit use of relational connections in close to home and expert life. These incorporate relational correspondence, bunch correspondence and dynamic, authoritative correspondence in the work environment or relational correspondence. Rule of Business Communication In request to make correspondence viable, it is important to follow a few rules and standards. Seven of them are fundamental and applicable, and these are clear, finished, brief, obliging, right, thought to be, concrete. These standards are frequently called 7C for business correspondence. The subtleties of these correspondence standards are examined underneath: Politeness Principle: When conveying, we should build up a cordial relationship with every individual who sends data to us.

To be inviting and polite is indistinguishable, and politeness requires an insightful and amicable activity against others. Axioms are notable that gracious “pay of graciousness is the main thing to win everything”. Correspondence staff ought to consistently remember this. The accompanying standards may assist with improving courtesy:Preliminary considering correspondence with family All glad families have the mystery of progress. This achievement originates from a strong establishment of closeness and closeness. Indeed, through private correspondence these cozy family connections become all the more intently. Correspondence is the foundation of different affiliations, building solid partners of obedient devotion, improving family way of life, and assisting with accomplishing satisfaction (Gosche, p. 1). In any case, so as to keep up an amicable relationship, a few families experienced tumultuous encounters. Correspondence in the family is an intricate and alluring marvel. Correspondence between families isn’t restricted to single messages between families or verbal correspondence.

It is a unique cycle that oversees force, closeness and limits, cohesiveness and flexibility of route frameworks, and makes pictures, topics, stories, ceremonies, rules, jobs, making implications, making a feeling of family life An intelligent cycle that makes a model. This model has passed ages. Notwithstanding the view as a family and family automatic framework, one of the greatest exploration establishments in between family correspondence centers around a family correspondence model. Family correspondence model (FCP) hypothesis clarifies why families impart in their own specific manner dependent on one another ‘s psychological direction. Early FCP research established in media research is keen on how families handle broad communications data. Family correspondence was perceived as an exceptional scholastic exploration field by the National Communications Association in 1989. Family correspondence researchers were at first impacted by family research, social brain science, and relational hypothesis, before long built up the hypothesis and began research in a family framework zeroed in on a significant job. Until 2001, the primary issue of the Family Communication Research Journal, Family Communication Magazine, was given. Family correspondence is more than the field of correspondence analysts in the family. Examination on family correspondence is normally done by individuals in brain science, humanism, and family research, to give some examples models. However, as the popular family correspondence researcher Leslie Baxter stated, it is the focal point of this intelligent semantic creation measure making the grant of family correspondence special. In the field of in-home correspondence, correspondence is normally not founded on autonomous messages from one sender to one beneficiary, yet dependent on the dynamic interdependency of data shared among families It is conceptualized. The focal point of this methodology is on the shared trait of semantic development inside family frameworks. As such, producing doesn’t happen in vacuum, however it happens in a wide scope of ages and social exchange.

Standards are rules end up being followed when performing work to agree to a given objective. Hierarchical achievement relies significantly upon compelling correspondence. So as to successfully impart, it is important to follow a few standards and rules. Coming up next are rules to guarantee powerful correspondence: clearness: lucidity of data is a significant guideline of correspondence. For beneficiaries to know the message plainly, the messages ought to be sorted out in a basic language. To guarantee that beneficiaries can without much of a stretch comprehend the importance of the message, the sender needs to impart unmistakably and unhesitatingly so the beneficiary can plainly and unquestionably comprehend the data.>

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