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  1. [10 marks] CCN and ActMedia provided a television channel targeted to individuals waiting
    in supermarket checkout lines. The channel showed news, short features, and
    advertisements. The length of the program assumed that the population mean time a shopper
    stands in a supermarket checkout line is 8 minutes. A sample of actual waiting times will be
    used to test this assumption and determine whether actual mean waiting time differs from this
    a. [2 marks]Formulate the hypotheses for this application. (Include a word

b. [3 marks]A sample of 120 shoppers showed a sample mean waiting time of 8.4
minutes. Assume a population standard deviation of σ = 3.2 minutes. What is the pvalue?
c. [2 marks]At α = 0.05, what is your conclusion?
d. [3 marks]Compute a 95% confidence interval for the population mean. Does it
support your conclusion? Explain.


MGSC2207 Summer Session I 2021
Page 3 of 9

  1. [8 marks] In 2019, 46% of business owners gave a holiday gift to their employees. A
    2020 survey of business owners indicated that 35% planned to provide a holiday gift to
    their employees. Suppose the survey results are based on a sample of 60 business
    a. [1 mark] How many business owners in the survey planned to provide a holiday gift to
    their employees in 2020?

b. [5 marks] Suppose the business owners in the sample did as they planned. Compute the pvalue for a hypothesis test that can be used to determine if the proportion of business
owners providing holiday gift had decreased from the 2019 level.
c. [2 marks] Using a 0.05 level of significance, would you conclude that the proportion of
business owners providing gifts decreased? What is the smallest level of significance for
which you could draw such a conclusion?

MGSC2207 Summer Session I 2021
Page 4 of 9

  1. [8] Mutual funds are classified as load or no-load funds. Load funds require an investor to
    pay an initial fee based on a percentage of the amount invested in the fund. The no load
    funds do not require this initial fee. Some financial advisors argue that the load mutual
    funds may be worth the extra fee becaise these funds provide a higher mean rate of return
    than the no-load mutual funds. A sample of 30 load and 30 no-load funds were selected.
    Data were collected on the annual return for the funds over a five-year period. The data
    are contained in the data set Mutual. Conduct an appropriate hypothesis test to
    determinewhether the load funds have a higher mean annual return over the five-year
    period. Include the error you might be committing. MGSC2207 Summer Session I 2021
    Page 5 of 9
  2. [3] Suppose that it is generally accepted that the variance in returns for the Mutual
    question is considered equal for no-load and load funds. Redo your calculations as
    necessary. MGSC2207 Summer Session I 2021
    Page 6 of 9
  3. [10] A large automobile insurance company selected samples of single and married male
    policy-holders and recorded the number who made an insurance claim over the preeding
    three-year period.
    Male Policy Holders: Single Married
    Sample size 400 900
    No. Making claims 76 90
    a. [7] Conduct a hypothesis test to determine whether there is a difference in
    proportion of claims between single and married male policy holders. Use a 0.05 level
    of significance

b. [3 marks – 2 for calculations; 1 for statement] Provide a 95% confidence interval for
the difference between the proportions for the two populations.

MGSC2207 Summer Session I 2021
Page 7 of 9

  1. [10] A city wants to know if a new advertising campaign to make citizens aware of the
    dangers of driving after drinking has been effective. It counts the number of drivers who
    have been stopped with more alcohol in their systems than the month after the campaign
    starts. The results are:
    Day of
    Before After
    Monday 5 2
    Tuesday 4 0
    Wednesday 2 2
    Thursday 4 1
    Friday 6 8
    Saturday 14 7
    Sunday 6 7
    Assume a significance level of 0.05. MGSC2207 Summer Session I 2021
    Page 8 of 9
  2. [11] Suppose now that we also have data on the number of claims by male retirees. The data
    are now:
    Male policy holders: Single Married Retirees
    No. Making claims 76 90 45
    Sample size 400 900 250
    a.[7] Assume that the three categories are mutually exclusive. Using a 0.05 significance
    level and a critical value approach, conduct an appropriate test to determine if there is
    a significant difference in the proportion of claims among the three groups. MGSC2207 Summer Session I 2021
    Page 9 of 9
    b. [4] If a significant difference is determined among the three groups making claims, conduct
    an appropriate test to determine where the significant differences lie.

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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