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Questions and Answers of Business Communication

How many degrees of freedom does an F-curve have? What are those degrees of freedom called?
On what distribution does one-way ANOVA rely?
Suppose that you want to compare the means of three populations by using one-way ANOVA. If the sample sizes are 5, 6, and 6, determine the degrees of freedom for the appropriate F-curve.
For what is one-way ANOVA used?
Explain in detail the purpose of conducting a multiple comparison.
On what distribution does the Tukey multiple-comparison procedure rely?
As reported on MLB.com, the five players with the highest runs batted in (RBI) during the 2012 Major League Baseball season are listed in the following table. Also included are the teams for which
Suppose that you want to compare the means of three populations by using the Tukey multiple-comparison procedure. If the sample sizes are 5, 6, and 6, determine the parameters for the appropriate
Identify a nonparametric alternative to the one-way ANOVA procedure.
Identify the distribution used as an approximation to the true distribution of the K-statistic for a Kruskal-Wallis test.
Figure 16.6 shows side-by-side boxplots of independent samples from three normally distributed populations having equal standard deviations. Based on these boxplots, would you be inclined to reject
Figure 16.7 shows side-by-side boxplots of independent samples from three normally distributed populations having equal standard deviations. Based on these boxplots, would you be inclined to reject
Consider a q-curve with parameters 3 and 14. a. Determine q0.05. b. Find the q-value with area 0.01 to its right.
In one-way ANOVA, what is the residual of an observation?
Suppose that a one-way ANOVA is being performed to compare the means of three populations and that the sample sizes are 10, 12, and 15. Determine the degrees of freedom for the F-statistic.
Another important type of data is ordinal data, which are data about order or rank given on a scale such as 1, 2, 3, . . . or A, B, C, . . . . Following are several variables. Which, if any, yield
The inferential procedures discussed in this book are intended for use with only one particular sampling procedure. What sampling procedure is that?
Of the mean, median, and mode, which is the only one appropriate for use with qualitative data?
What is the acronym used for simple random sampling without replacement?
True or false: The mean, median, and mode can all be used with quantitative data. Explain your answer.
Specify the mathematical symbol used for each of the following descriptive measures. a. Sample mean b. Sample standard deviation c. Population mean d. Population standard deviation
Complete the following statement: A descriptive measure is resistant if . . . .
Almost all the observations in any data set lie within _______standard deviations to either side of the mean.
Before planning and conducting a study to obtain information, what should be done?
Among the measures of center discussed, which is the only one appropriate for qualitative data?
Explain why a sample of 30 dentists from Seattle taken to estimate the median income of all Seattle residents is not representative.
Identify an important reason for grouping data.
Do the concepts of class limits, marks, cutpoints, and midpoints make sense for qualitative data? Explain your answer.
Identify the most appropriate measure of variation corresponding to each of the following measures of center. a. Mean b. Median
Data Set A has more variation than Data Set B. Decide which of the following statements are necessarily true. a. Data Set A has a larger mean than Data Set B. b. Data Set A has a larger standard
For a particular population, is the population mean a variable? What about a sample mean?
We used slightly different methods for determining the "middle" of a class with limit grouping and cutpoint grouping. Identify the methods and the corresponding terminologies.
Explain the difference between a frequency histogram and a relative-frequency histogram.
The U.S. National Center for Health Statistics collects data on causes of death and publishes its findings in National Vital Statistics Reports. Which of the three main measures of center is
Of the variables you have studied so far, which type yields nonnumerical data?
What is the relationship between the joint probability and marginal probabilities of two independent events?
If two or more events have the property that at least one of them must occur when the experiment is performed, the events are said to be ____________.
What does it mean for two or more events to be mutually exclusive?
A, B, and C are mutually exclusive events such that P(A) = 0.2, P(B) = 0.6, and P(C) = 0.1. Find P(A or B or C).
The number of bedrooms per single-family Dwelling
E is an event and P(not E) = 0.4. Find P(E).
A and B are events such that P(A) = 0.2, P(B) = 0.6, and P(A& B) = 0.1. Find P(A or B).
The number of automobiles per family. We have presented a "data scenario." In each case, decide which type of grouping (single-value, limit, or cutpoint) is probably the best.
Suppose that E is an event. Use probability notation to represent a. The probability that event E occurs. b. The probability that event E occurs is 0.436.
The carapace lengths, to the nearest hundredth of a millimeter, of a sample of 50 giant tarantulas. We have presented a "data scenario." In each case, decide which type of grouping (single-value,
In a bar chart, unlike in a histogram, the bars do not abut. Give a possible reason for that.
A and B are events such that P(A) = 0.4, P(B) = 0.5, and P(A& B) = 0.2. Answer each question and explain your reasoning. a. Are A and B mutually exclusive? b. Are A and B independent?
A and B are events such that P(A) = 0.4 and P(B | A) = 0.7. Find P(A& B).
The sum of the joint probabilities in a row or column of a joint probability distribution equals the ____________ probability in that row or column.
Four actions are to be performed in a definite order. There are three possibilities for the first action; corresponding to each of these possibilities are four possibilities for the second action;
Determine 0!, 1!, 3!, and 4!.
How many samples of size 3 are possible from a population of size 10?
Explain what is wrong with the following argument: When two balanced dice are rolled, the sum of the dice can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, giving 11 possibilities. Therefore the
In one of his books, Ted Sorenson, Special Counsel to President John F. Kennedy, presents an intimate biography of the extraordinary man. According to Sorenson, Kennedy "read every fiftieth letter of
In the article, "Non-probability Sampling Designs for Litigation Surveys (Trademark Reporter, Vol. 81, pp. 169-179), J. Jacoby and H. Handlin discussed the controversy about whether nonprobability
Refer to Exercise 4.65. Among the events A, B, C, and D, identify the collections of events that are mutually exclusive.
Data from a sample of Americans yielded the following estimates of average TV viewing time per month for all Americans 2 years old and older. The times are in hours and minutes; Q1 stands for first
Refer to Exercise 4.66. Among the events A, B, C, and D, identify the collections of events that are mutually exclusive.
An American roulette wheel contains 38 numbers, of which 18 are red, 18 are black, and 2 are green. When the roulette wheel is spun, the ball is equally likely to land on any of the 38 numbers. For a
What type of graphical displays are useful for portraying events and relationships among events?
According to Nielsen Media Research, 98.6% of (U.S.) households own a TV and 85.2% of TV households own a DVD player. a. Under what condition can you use the information provided to determine the
What is the difference between selecting a member at random from a finite population and taking a simple random sample of size 1?
If a member is selected at random from a finite population, probabilities are identical to ________________.
An experiment has 20 possible outcomes, all equally likely. An event can occur in five ways. The probability that the event occurs is ________________.
An experiment has 40 possible outcomes, all equally likely. An event can occur in 25 ways. The probability that the event occurs is _____________.
State the frequentist interpretation of probability.
Suppose that A and B are mutually exclusive events such that P(A) = 0.25 and P(B) = 0.40. Determine P(A or B).
From the Statistical Abstract of the United States and the article "Average Salaries in the NBA, NFL, MLB and NHL" by J. Dorish, published on the Yahoo! Contributor Network, we obtained the following
Suppose that C and D are mutually exclusive events such that P(C) = 0.14 and P(D) = 0.32. Determine P(C or D).
In a designed experiment, a. What are the experimental units? b. If the experimental units are humans, what term is often used in place of experimental unit?
The Japan Automobile Manufacturer's Association provides data on exported vehicles in Motor Vehicle Statistics of Japan. In 2010, cars, trucks, and buses constituted 88.3%, 9.3%, and 2.4% of vehicle
The American Hospital Association conducts annual surveys of hospitals in the United States and publishes its findings in AHA Hospital Statistics. Data on hospital type for U.S. registered hospitals
Alcohol and Health Monograph 1. DHHS Pub. No. (ADM) 82-1190) examined, among other issues, alcohol consumption patterns of U.S. adults by marital status. Data for marital status and number of drinks
In a designed experiment, there is one factor with four levels. How many treatments are there?
In a designed experiment, there is one factor with five levels. How many treatments are there?
In Issue 338 of the Amstat News, then president of the American Statistical Association, F. Scheuren reported the results of a survey on how members would prefer to receive ballots in annual
Let E be an event with probability 0.35. Find the probability of (not E).
In a designed experiment, there are two factors. One factor has m levels and the other factor has n levels. Determine the number of treatments.
Zillow.com is an online database that provides real estate information for U.S. homes that are for rent or sale. It also presents statistics on recently sold homes. The following table gives various
Let F be an event with probability 0.72. Find the probability of (not F).
Suppose that C and D are events such that P(C) = 0.35, P(D) = 0.40, and P(C & D) = 0.30. Determine P(C or D).
Suppose that A and B are events such that P(A) = 0.84, P(B) = 0.46, and P(A& B) = 0.38. Determine P(A or B).
What meaning is given to the probability of an event by the frequentist interpretation of probability?
Decide which of these numbers could not possibly be probabilities. Explain your answers. a. 0.047 b. −0.047 c. 3.5 d. 1/3.5
Identify a commonly used graphical technique for portraying events and relationships among events.
Which of the following numbers could not possibly be a probability? Justify your answer. a. 5/6 b. 3.5 c. 0
If the condition for using the empirical rule is met, why should that rule be used instead of Chebyshev's rule?
Apply Chebyshev's rule with k = 3 to verify that at least 89% of the observations in any data set lie within three standard deviations to either side of the mean, that is, between x − 3s and x + 3s.
The National Center for Education Statistics publishes information about school enrollment in Digest of Education Statistics. According to that document, 85.3% of students attend public schools,
What are the six traits of professionalism?
Define ethics and explain what ethical communication encompasses.
How does cultural context affect communication?
How does your understanding of the communication process help you conduct business more effectively?
Write a paragraph introducing yourself to your instructor and your class. Address such areas as your background, interests, achievements, and goals. Submit your paragraph using email, blog, or social
Your boss wants to send a brief email message to welcome employees recently transferred to your department from your Hong Kong branch. They all speak English to some degree, but your boss asks you to
Find a free online communication service that you have no experience using as a content creator or contributor. Services to consider include blogging (such as Blogger), micro blogging (such as
Write four messages of no more than 140 characters each (short enough to work as Twitter tweets, in other words) to persuade other college students to take the business communication course. Think of
In a report of no more than one page, explain why you think each of the following is or is not ethical: a. Deemphasizing negative test results in a report on your product idea b. Taking an office
For items 1-5, indicate which words are common nouns and which are proper nouns.1. Give the balance sheet to Melissa.2. After three years of declining sales, the board fired the CEO and hired a
How does an agenda help make a meeting more successful?

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