QNT 561 Final Exam - Assignment

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QNT 561 Final Exam Assignment

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• 1. A random sample of size 15 is selected from a
  normal population. The population standard
  deviation is unknown. Assume the null hypothesis
  indicates a two-tailed test and the researcher
  decided to use the 0.10 significance level. For
  what values of t will the null hypothesis not be
  rejected?
• To the left of -1.645 or to the right of 1.645
• To the left of -1.345 or to the right of 1.345
• Between -1.761 and 1.761
• To the left of -1.282 or to the right of 1.282
• 2. Which of the following is a characteristic of
  the F distribution?
• Normally distributed
• Negatively skewed
• Equal to the t-distribution
• Positively skewed

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•  
• 3. For a chi-square test involving a contingency
  table, suppose the null hypothesis is rejected.
  We conclude that the two variables are
  __________.
• related
• curvilinear
• linear
• not related
• 4. A sales manager for an advertising agency
  believes that there is a relationship between the
  number of contacts that a salesperson makes and
  the amount of sales dollars earned. What is the
  dependent variable?
• sales managers
• amount of sales dollars
• salesperson
• number of contacts

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• 5. Which of the following is most appropriately
  displayed with a frequency table?
• What percentage of people prefer Hunt's brand
  ketchup
• The home location of the most valuable customers
• How much explanatory value comes from the study's
  variables
• The relationship between gender and job
  performance
• 6. The manager of Paul's fruit and vegetable
  store is considering the purchase of a new
  seedless watermelon from a wholesale distributor.
  Since this seedless watermelon costs 4, will
  sell for 7, and is highly perishable, he only
  expects to sell between six and nine of them.
  What is the opportunity loss for purchasing nine
  watermelons when the demand is for seven
  watermelons?
• 8
• 4
• 12
• 0

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• 7. A firm offers routine physical examinations as
  part of a health service program for its
  employees. The exams showed that 8 of the
  employees needed corrective shoes, 15 needed
  major dental work, and 3 needed both corrective
  shoes and major dental work. What is the
  probability that an employee selected at random
  will need either corrective shoes or major dental
  work?
• .25
• 1.00
• .50
• .20
• 8. When data is collected using a qualitative,
  nominal variable, what is true about a frequency
  distribution that summarizes the data?
• The upper and lower class limits must be
  calculated.
• The number of classes is equal to the number of
  variables plus 2.
• The 5 to the k rule can be applied.
• A pie chart can be used to summarize the data.

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• 9. If an ANOVA test is conducted and the null
  hypothesis is rejected, what does this indicate?
• The p-value is less than a.
• All population means are different.
• At least one pair of population means is
  different.
• The population means are equal.
• 10. A random sample of 20 items is selected from
  a population. When computing a confidence
  interval for the population mean, what number of
  degrees of freedom should be used to determine
  the appropriate t-value?
• 25
• 21
• 19
• 20

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• 11. The question, "Should products be withdrawn
  if even one death is associated with its
  prescribed use, even if no fault for the tampered
  product accrues to the manufacturer?" is an
  example of a(n) _____.
• strip data mining issue
• unresearchable question
• ill-defined problem
• favored-technique problem
• 12. A large department store examined a sample of
  the 18 credit card sales and recorded the amounts
  charged for each of three types of credit cards
  MasterCard, Visa, and Discover. Six MasterCard
  sales, seven Visa, and five Discover sales were
  recorded. The store used an ANOVA to test if the
  mean sales for each credit card were equal. What
  are the degrees of freedom for the F statistic?
• 2 in the numerator, 15 in the denominator
• 6 in the numerator, 15 in the denominator
• 18 in the numerator, 3 in the denominator
• 3 in the numerator, 18 in the denominator

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• 13. A linear trend equation is used to represent
  time series values when the data are changing by
  equal what?
• amounts
• percents and proportions
• proportions
• percents
• 14. Which of the following goals should a good
  survey instrument accomplish?
• Encourage each participant to provide accurate
  responses
• Encourage participants to be succinct in their
  responses
• Encourage participants to answer only those
  questions they are comfortable answering
• Encourage participants to end the survey when
  they feel they have contributed enough information

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• 15. Kroger, a grocery store chain, wants to
  identify the ideal store layout for increasing
  store sales. Because it primarily uses two store
  designs, one a grid layout with vertical aisles
  divided by a center aisle and another using a
  traditional straight-aisle pattern, Kroger will
  match pairs of stores that have different designs
  but similar shopper demographics and location.
  Sales from each pair will then be compared to
  determine if store design is related to sales.
  Which type of study is this an example of?
• Exploratory study
• Case study
• Ex post facto study
• Longitudinal study
• 16. Bones Brothers Associates prepare
  individual tax returns. Over prior years, Bones
  Brothers has maintained careful records regarding
  the time to prepare a return. The mean time to
  prepare a return is 90 minutes and the standard
  deviation of this distribution is 14 minutes.
  Suppose 100 returns from this year are selected
  and analyzed regarding the preparation time. What
  assumption do you need to make about the shape of
  the population distribution of all possible tax
  preparation times to make inferences about the
  mean time to complete a tax form?
• The population distribution is skewed to the
  left.
• The population distribution is skewed to the
  right.
• The shape of the population distribution does not
  matter.
• The population distribution is normal.

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• 17. Checklists with several items to be
  considered by respondents may be subject to
  _____.
• recency effects
• leniency effects
• halo effects
• primacy effects
• 18. In a multiple rating list scale, ____.
• participants rate multiple items on a 3-point
  scale
• the participant is restricted to circling their
  rating
• it is possible to visualize the results better
  than with other numerical scales
• the data generated are always ordinal

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• 19. As the size of the sample increases, what
  happens to the shape of the distribution of
  sample means?
• It cannot be predicted in advance
• It is positively skewed
• It is negatively skewed
• It approaches a normal distribution
• 20. For any chi-square goodness-of-fit test, the
  number of degrees of freedom is found by ______.
• n k
• k -1
• n k - 1
• n 1

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• 21. Bank Choice is concerned about stagnating
  profits and asks, "How can profitability be
  improved?" This is an example of a (n) _____.
• research question
• measurement question
• management question
• investigative question
• 22. A machine is set to fill the small-size
  packages of MM candies with 56 candies per bag.
  A sample revealed three bags of 56, two bags of
  57, one bag of 55, and two bags of 58. To test
  the hypothesis that the mean candies per bag is
  56, how many degrees of freedom are there?
• 1
• 7
• 9
• 8

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• 23. An experimental study is one that _____.
• attempts to reveal why or how one variable
  produces changes in another
• involves manipulation of one or more variables to
  determine the effect on another variable
• attempts to capture a population's
  characteristics by making inferences from a
  sample's characteristics and testing resulting
  hypotheses
• discovers answers to the questions who, what,
  when, where, or how much
• 24. The monthly salaries of a sample of 100
  employees were rounded to the nearest 10. They
  ranged from a low of 1,040 to a high of 1,720.
  If we want to condense the data into seven
  classes, what is the most convenient class
  interval?
• 200
• 50
• 150
• 100

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• 25. Consider a regression analysis, where the
  correlation coefficient is 0.18. Then, the
  coefficient of determination is _______.
• .0324
• .36
• 1.16
• .424
• 26. In multiple regression analysis, when the
  independent variables are highly correlated, this
  situation is called __________________.
• homoscedasticity
• curvilinearity
• multicollinearity
• autocorrelation

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• 27. Sam's Club installed self-checkout stations
  that can track not only member's purchases but
  also packaging problems, as the system uses
  universal product codes to match the item the
  shopper has in their cart with its price and
  inventory level in the store, generating a
  spreadsheet style report for the researcher. If
  you consider the scanner as the tool for
  collecting data for Sam's researchers, they are
  doing data entry by ____.
• spreadsheet
• Optical Character Recognition
• Field editing
• Voice recognition
• 28. The weekly incomes of a large group of
  executives are normally distributed with a mean
  of 2,000 and a standard deviation of 100. What
  is the z-score for an income of 2,100?
• 1.683
• 0.90
• 2.00
• 1.00

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• 29. A ranking scale is a scale that _____.
• scores an object without making a direct
  comparison to another object
• groups participants
• groups concepts according to specific criteria
• scores an object by making a comparison and
  determining order among two or more objects
• 30. What is the interpretation of a 96
  confidence level?
• The interval contains 96 of all sample means.
• Approximately 96 out of 100 such intervals would
  include the true value of the population
  parameter.
• There's a 96 chance that the given interval
  includes the true value of the population
  parameter.
• There's a 4 chance that the given interval does
  not include the true value of the population
  parameter.

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