BUS 324

86. In binary integer linear program, the integer variables take only the values: a. 0 or 1. b. 0 or ∞. c. 1 or ∞. d. 1 or -1.

a. 0 or 1.

39. What is the confidence coefficient when the level of significance is 0.03? a. 0.9700 b. 0.0376 c. 0.7924 d. 0.7776

a. 0.9700

54. _____ is used to test the hypothesis that the values of the regression parameters β1, β2, . . . , βq are all zero. a. An F test b. A t test c. The least squares method d. Extrapolation

a. An F test

15. Which of the following are necessary to be determined to define the classes for a frequency distribution with quantitative data? a. Number of nonoverlapping bins, width of each bin, and bin limits b. Width of each bin and bin lower limits c. Number of overlapping bins, width of each bin, and bin upper limits d. Width of each bin and number of bins

a. Number of nonoverlapping bins, width of each bin, and bin limits

2. ______ helps in constructing a mathematical model to predict the future sales, based on past data. a. Predictive analytics b. Decision analysis c. Prescriptive analytics d. Descriptive analytics

a. Predictive analytics

13. A summary of data that shows the number of observations in each of several nonoverlapping bins is called a. a frequency distribution. b. a sample summary. c. a bin distribution. d. an observed distribution.

a. a frequency distribution.

83. The objective function for a linear optimization problem is: Max 3x + 5y, with one of the constraints being x, y ≥ 0 and integer. x and y are the only decisions variables. This is an example of a(n) _____. a. all-integer linear program b. mixed-integer linear program c. nonlinear program d. binary integer linear program

a. all-integer linear program

89. A constraint involving binary variables that does not allow certain variables to equal one unless certain other variables are equal to one is known as a _____. a. conditional constraint b. corequisite constraint c. k out of n alternatives constraint d. mutually exclusive constraint

a. conditional constraint

16. The _____ shows the number of data items with values less than or equal to the upper class limit of each class. a. cumulative frequency distribution b. frequency distribution c. percent frequency distribution d. relative frequency distribution

a. cumulative frequency distribution

72. A(n) _____ solution satisfies all the constraint expressions simultaneously. a. feasible b. objective c. infeasible d. extreme

a. feasible

43. A linear regression analysis for which any one unit change in the independent variable is assumed to: a. have the same change in the dependent variable. b. have no change in the dependent variable. c. have an inverse effect on the dependent variable d. have a nullifying effect on the dependent variable

a. have the same change in the dependent variable.

30. A two-dimensional graph representing the data using different shades of color to indicate magnitude is called a ______. a. heat map b. bubble chart c. column chart d. pie chart

a. heat map

65. The moving averages and exponential smoothing methods are appropriate for a time series exhibiting _____. a. horizontal pattern b. cyclical pattern c. trends d. seasonal effects

a. horizontal pattern

68. The term _____ refers to the expression that defines the quantity to be maximized or minimized in a linear programming model. a. objective function b. problem formulation c. decision variable d. association rule

a. objective function

20. Any data value with a z-score less than -3 or greater than +3 is treated as a(n) a. outlier. b. usual value. c. whisker. d. z-score value.

a. outlier.

55. forecast is defined as a(n): a. prediction of future values of a time series. b. quantitative method used when historical data on the variable of interest are either unavailable or not applicable. c. set of observations on a variable measured at successive points in time. d. outcome of a random experiment.

a. prediction of future values of a time series.

8. The act of collecting data that are representative of the population data is called a. random sampling. b. sample data. c. population sampling. d. applications of business analytics.

a. random sampling.

44. In the graph of the simple linear regression equation, the parameter β1 is the _____ of the regression line. a. slope b. x-intercept c. y-intercept d. end-point

a. slope

58. Trend refers to: a. the long-run shift or movement in the time series observable over several periods of time. b. the outcome of a random experiment. c. the recurring patterns observed over successive periods of time. d. the short-run shift or movement in the time series observable at some specific period of time.

a. the long-run shift or movement in the time series observable over several periods of time.

4. A children's apparel manufacturer used descriptive analytics: a. to present supply chain to managers visually. b. to achieve efficiency in delivery of goods. c. to schedule staff and vehicle for delivery. to plan capacity utilization by incorporating the inherent uncertainty in commodities pricing.

a. to present supply chain to managers visually.

50. What would be the coefficient of determination if the total sum of squares (SST) is 23.29 and the sum of squares due to regression (SSR) is 10.03? a. 2.32 b. 0.43 c. 13.26 d. 0.89

b. 0.43

1. ______ encompasses reports, data dashboards, and descriptive statistics to describe the past data. a. Predictive analytics b. Descriptive analytics c. Prescriptive analytics d. Decision analysis

b. Descriptive analytics

66. _____ uses a weighted average of past time series values as the forecast. a. The qualitative method b. Exponential smoothing c. Correlation analysis d. The causal model

b. Exponential smoothing

34. A manufacturer wishes to determine if the average profit from the sale of his product exceeds $6,710. Which of the following is the appropriate hypothesis test? a. H0: population mean profit from sale > $6,710 vs. H1: population mean profit from sale ≤ $6,710 b. H0: population mean profit from sale ≤ $6,710 vs. H1: population mean profit from sale > $6,710 c. H0: population mean profit from sale < $6,710 vs. H1: population mean profit from sale ≥ $6,710 d. H0: population mean profit from sale ≥ $6,710 vs. H1: population mean profit from sale < $6,710

b. H0: population mean profit from sale ≤ $6,710 vs. H1: population mean profit from sale > $6,710

3. Which of the following techniques is used in predictive analytics? a. Data dashboards b. Linear regression c. Data visualization d. Optimization models

b. Linear regression

Rob is a financial manager with Sharez, an investment advisory company. He must select specific investments—for example, stocks and bonds—from a variety of investment alternatives. 79. Which of the following statements is most likely to be the objective function in this scenario? a. Minimization of the number of stocks held b. Maximization of expected return c. Minimization of tax dues d. Maximization of investment risk

b. Maximization of expected return

37. Robin Inc. feared that the average company loss is running beyond $34,000. It initially conducted a hypothesis test on a sample extracted from its database. The hypothesis was formulated as H0: average company loss $34,000 vs. H1: average company loss > $34,000. The test resulted in favor of Robin Inc.'s loss not exceeding $34,000. Detailed study of company accounts later revealed that the average company loss had run up to $37,896. Which of the following errors were made during the hypothesis test? a. Type III error b. Type II error c. Type I error d. Type IV error

b. Type II error

70. A controllable input for a linear programming model is known as a _____. a. parameter b. decision variable c. dummy variable d. constraint

b. decision variable

31. Consider the clustered bar chart of the dashboard developed to monitor the performance of a call center: This chart allows the IT manager to a. identify a particular type of problem by the call volume. b. identify a particular type of problem by location. c. identify different types of problems (Email, Internet, or Software) in the call center. d. identify the frequency of each problem in the call center.

b. identify a particular type of problem by location.

38. Type II error occurs when the test: a. correctly fails to reject an actually true null hypothesis. b. incorrectly fails to reject an actually false null hypothesis. c. correctly rejects an actually false null hypothesis. d. incorrectly rejects an actually true null hypothesis.

b. incorrectly fails to reject an actually false null hypothesis.

85. The objective function for an optimization problem is: Max 5x - 3y, with one of the constraints being x, y ≥ 0 and y integer. x and y are the only decisions variables. This is an example of a(n) _____. a. all-integer linear program b. mixed-integer linear program c. LP relaxation of the integer linear program d. binary integer linear program

b. mixed-integer linear program

32. Which of the following propositions describes an existing theory or belief? a. standard deviation b. null hypothesis c. proportion d. alternative hypothesis

b. null hypothesis

6. A variable whose values are not known with certainty is called a _____. a. certain variable b. random variable c. constant variable d. decision variable

b. random variable

78. The change in the optimal objective function value per unit increase in the right-hand side of a constraint is given by the _____. a. objective function coefficient b. shadow price c. restrictive cost d. right-hand side allowable increase

b. shadow price

71. Nonnegativity constraints ensure that a. the problem modeling includes only nonnegative values in the constraints. b. the solution to the problem will contain only nonnegative values for the decision variables. c. the objective function of the problem always returns maximum quantities. d. there are no inequalities in the constraints.

b. the solution to the problem will contain only nonnegative values for the decision variables.

12. Data collected from several entities over several time periods is a. categorical and quantitative data. b. time series data. c. source data. d. cross-sectional data.

b. time series data.

75. Problems with infeasible solutions arise in practice because: a. management doesn't specify enough restrictions. b. too many restrictions have been placed on the problem. c. of errors in objective function formulation. d. there are too few decision variables.

b. too many restrictions have been placed on the problem.

76. The situation in which the value of the solution may be made infinitely large in a maximization linear programming problem or infinitely small in a minimization problem without violating any of the constraints is known as _____. a. infeasibility b. unbounded c. infiniteness d. semi-optimality

b. unbounded

19. A _____ determines how far a particular value is from the mean relative to the data set's standard deviation. a. coefficient of variation b. z-score c. variance d. percentile

b. z-score

45. When the mean value of the dependent variable is independent of variation in the independent variable, the slope of the regression line is _____. a. positive b. zero c. negative d. infinite

b. zero

48. What would be the value of the sum of squares due to regression (SSR) if the total sum of squares (SST) is 25.32 and the sum of squares due to error (SSE) is 6.89? a. 31.89 b. 19.32 c. 18.43 d. 15.32

c. 18.43

64. If the forecasted value of the time series variable for period 2 is 22.5 and the actual value observed for period 2 is 25, what is the forecast error in period 2? a. 3 b. 2 c. 2.5 d. -2.5

c. 2.5

A canned food manufacturer has its manufacturing plants in three locations across a state. Their product has to be transported to three central distribution centers, which in turn disperse the goods to seventy-two stores across the state. 82. Which of the following visualization tools could help understand this problem better? a. A time-series plot b. A scatter chart c. A network graph d. A contour plot

c. A network graph

7. _____ act(s) as a representative of the population. a. The analytics b. The variance c. A sample d. The random variables

c. A sample

11. _____ are collected from several entities at the same point in time. a. Time series data b. Categorical and quantitative data c. Cross-sectional data d. Random data

c. Cross-sectional data

35. Which of the following is true about determining the proper form of the hypotheses? a. H0 is statistically proved true while testing b. failure to reject H0 proves H1 wrong c. H0 is always assumed to be true in testing d. H1 is always assumed to be true in testing

c. H0 is always assumed to be true in testing

74. _____ is the situation in which no solution to the linear programming problem satisfies all the constraints. a. Unboundedness b. Divisibility c. Infeasibility d. Optimality

c. Infeasibility

84. The linear program that results from dropping the integer requirements for the variables in an integer linear program is known as _____. a. convex hull b. a mixed-integer linear program c. LP relaxation d. a binary integer linear program

c. LP relaxation

A canned food manufacturer has its manufacturing plants in three locations across a state. Their product has to be transported to three central distribution centers, which in turn disperse the goods to seventy-two stores across the state. 81. Which of the following is most likely to be the objective function in this scenario? a. Increasing the number of goods manufactured at the plant b. Decreasing the cost of their raw material sourcing c. Minimizing the cost of shipping goods from the plant to the store d. Minimizing the quantity of goods distributed across the stores

c. Minimizing the cost of shipping goods from the plant to the store

21. The correlation coefficient will always take values a. greater than 0. b. between -1 and 0. c. between -1 and +1. d. less than -1.

c. between -1 and +1.

27. If the scatter chart indicates a positive linear relationship between two variables, then their correlation coefficient is a. equal to -1. b. greater than 1. c. between 0 and +1. d. between -1 and 0.

c. between 0 and +1.

29. In order to visualize three variables in two-dimensional graph, we use a a. 2-D chart. b. 3-D chart. c. bubble chart. d. column chart.

c. bubble chart.

9. The data on grades (A, B, C, and D) scored by all students in a test is an example of a. quantitative data. b. sample data. c. categorical data. d. analytical data.

c. categorical data.

24. A useful type of table for describing data of two variables is a a. data table. b. bubble chart. c. crosstabulation. d. scatter chart.

c. crosstabulation.

18. The variance is based on the a. deviation about the median. b. number of variables. c. deviation about the mean. d. correlation in the data.

c. deviation about the mean.

40. For a one-tailed test, the critical value: a. divides the sampling distribution into three parts. b. is the number of standard errors away from the sample mean. c. helps determine if the test statistic falls in the rejection region or not. d. fails to reject the null hypothesis if the test statistic exceeds the critical value.

c. helps determine if the test statistic falls in the rejection region or not.

22. Data-ink is the ink used in a table or chart that a. does not help in conveying the data to the audience. b. helps in presenting data when the audience need not know exact values. c. is necessary to convey the meaning of the data to the audience. d. increases the Non-data-ink ratio.

c. is necessary to convey the meaning of the data to the audience.

5. A variable is defined as a a. quantity of interest that can take on same values. b. set of values. c. quantity of interest that can take on different values. d. characteristic that takes on same values from a set of values.

c. quantity of interest that can take on different values.

69. Constraints are: a. quantities to be maximized in a linear programming model. b. quantities to be minimized in a linear programming model. c. restrictions that limit the settings of the decision variables. d. input variables that can be controlled during optimization.

c. restrictions that limit the settings of the decision variables.

42. A regression analysis involving one independent variable and one dependent variable is referred to as a _____. a. factor analysis b. time series analysis c. simple regression d. data mining

c. simple regression

46. The procedure of using sample data to find the estimated regression equation is better known as _____. a. point estimation b. interval estimation c. the least squares method d. extrapolation

c. the least squares method

23. Tables should be used when a. the reader need not refer to specific numerical values. b. the reader need not make precise comparisons between different values and not just relative comparisons. c. the values being displayed have different units or very different magnitudes. d. the reader need not differentiate the columns and rows.

c. the values being displayed have different units or very different magnitudes.

56. A set of observations on a variable measured at successive points in time or over successive periods of a. geometric series b. time invariant set c. time series d. logarithmic series

c. time series

26. A _____ is a line that provides an approximation of the relationship between the variables. a. line chart b. sparkline c. trendline d. gridline

c. trendline

14. Compute the relative frequencies for the data given in the table below: Grades Number students of A 16 B 28 C 33 D 13 Total 90 a. 0.31, 0.14, 0.37, 0.18 b. 0.37, 0.14, 0.31, 0.18 c. 0.14, 0.31, 0.37, 0.18 d. 0.18, 0.31, 0.37, 0.14

d. 0.18, 0.31, 0.37, 0.14

63. _____ is the amount by which the predicted value differs from the observed value of the time series variable. a. Mean forecast error b. Mean absolute error c. Smoothing constant d. Forecast error

d. Forecast error

41. For a two-sample hypothesis test for differences in population parameters (1) and (2), which of the following is the correct form of an upper-tailed test? a. H0: population parameter (1) - population parameter (2) ≥ 0 vs. H1: population parameter (1) - population parameter (2) < 0 b. H0: population parameter (1) - population parameter (2) > 0 vs. H1: population parameter (1) - population parameter (2) ≤ 0 c. H0: population parameter (1) - population parameter (2) < 0 vs. H1: population parameter (1) - population parameter (2) > 0 d. H0: population parameter (1) - population parameter (2) ≤ 0 vs. H1: population parameter (1) - population parameter (2) > 0

d. H0: population parameter (1) - population parameter (2) ≤ 0 vs. H1: population parameter (1) - population parameter (2) > 0

33. Which of the following is a valid one-sample hypothesis test? a. H0: population parameter ≠ constant vs. H1: population parameter = constant b. H0: population parameter > constant vs. H1: population parameter ≤ constant c. H0: population parameter < constant vs. H1: population parameter ≥ constant d. H0: population parameter = constant vs. H1: population parameter ≠ constant

d. H0: population parameter = constant vs. H1: population parameter ≠ constant

73. Which algorithm, developed by George Dantzig, is effective at investigating extreme points in an intelligent way to find the optimal solution to even very large linear programs? a. The ellipsoidal algorithm b. The complex algorithm c. The trial-and-error algorithm d. The simplex algorithm

d. The simplex algorithm

87. The objective function for a linear optimization problem is: Max 3x + 2y, with one of the constraints being x, y = 0, 1. x and y are the only decision variables. This is an example of a _____. a. nonlinear program b. mixed-integer linear program c. LP relaxation of the integer linear program d. binary integer linear program

d. binary integer linear program

Rob is a financial manager with Sharez, an investment advisory company. He must select specific investments—for example, stocks and bonds—from a variety of investment alternatives. 80. Restrictions on the type of permissible investments would be a _____ in this case. a. feasible solution b. surplus variable c. slack variable d. constraint

d. constraint

47. Prediction of the value of the dependent variable outside the experimental region is called _____. a. interpolation b. forecasting c. averaging d. extrapolation

d. extrapolation

57. A _____ pattern exists when the data fluctuate randomly around a constant mean over time. a. vertical b. seasonal c. cyclical d. horizontal

d. horizontal

49. The coefficient of determination: a. takes values between -1 to +1. b. is equal to zero for a perfect fit. c. is equal to one for the poorest fit. d. is used to evaluate the goodness of fit.

d. is used to evaluate the goodness of fit.

88. The sum of two or more binary variables must be less than or equal to one in _____ constraint. a. corequisite b. conditional c. multiple-choice d. mutually exclusive

d. mutually exclusive

67. Autoregressive models: a. use the average of the most recent data values in the time series as the forecast for the next period. b. are used to smooth out random fluctuations in time series. c. relate a time series to other variables that are believed to explain or cause its behavior. d. occur whenever all the independent variables are previous values of the same time series.

d. occur whenever all the independent variables are previous values of the same time series.

10. The data on the time taken by 10 students in a class to answer a test is an example of a. population data. b. categorical data. c. time series data. d. quantitative data.

d. quantitative data.

17. The simplest measure of variability is the a. variance. b. standard deviation. c. coefficient of variation. d. range.

d. range.

25. A _____ is a graphical presentation of the relationship between two quantitative variables. a. histogram b. bar chart c. pie chart d. scatter chart

d. scatter chart

77. The study of how changes in the input parameters of a linear programming problem affect the optimal solution is known as_____. a. regression analysis b. cluster analysis c. optimality analysis d. sensitivity analysis

d. sensitivity analysis

36. Which of the following is a Type I error? a. the null hypothesis is actually true, and the hypothesis test correctly fails to reject it b. the null hypothesis is actually false, but the test incorrectly fails to reject it c. the null hypothesis is actually false, and the test correctly rejects it d. the null hypothesis is actually true, but the hypothesis test incorrectly rejects it

d. the null hypothesis is actually true, but the hypothesis test incorrectly rejects it

28. A line chart displaying the data values collected over a period of time is termed as a a. boxplot. b. frequency graph. c. dot plot d. time series plot.

d. time series plot.