5. Business
research is a type of ________________ inquiry. (Points : 3)

6. What are
the three main types of nonprobability sampling used in business research?
(Points : 3)

7. In a
situation where in a confidence level .01 what percent of the measurement
results are left to chance? (Points : 3)

8. What is
the most important ingredient in a statistical testing procedure? (Points :
3)

9. If a
production manager wanted to determine whether or not the first shift was
processing more widgets than the second shift, what type of statistical process
would be used? (Points : 3)

10. What
type of t test seeks to determine whether or not a relationship exists in one
sample over two conditions? _______________ (Points : 3)

B, C and F
D, E and G C, F and H A, E and H 
The distribution (shape) of the population (e.g., normal, skewed, flat, etc.)
The measurement scale/nature of the data being evaluated (nominal, ordinal, interval or ratio) The size of the population (assuming it is much larger than any samples) The level of significance (_) you wish to place on the test results Whether you have matched/related or unmatched/unrelated samples The degrees of freedom (sample size) associated with your sample(s) The statement of the null and research hypotheses Whether the sample was stratified or not 
A, B, E
B, C, D C, D, G E, F, G 
H1: There is a significant difference in the teaming behavior before and
after the training.
H0: There is no significant difference in the teaming behavior before and after the training. H1: There is no significant difference in the teaming behavior before and after the training. H0: There is a significant difference in the teaming behavior before and after the training 
True
False 
True
False 
True
False 
True
False 
True
False 
True
False 
21. Calculation: The
mean price of 5 items is $7.00. The prices of the first four items are
$6.50, $8.00, $5.50 and $6.00. How much does the fifth item
cost? (Points : 4)

22. Calculation:
The range of a set of numbers is 1,362. The greatest number is 2,172.
What is the least number? (Points : 4)

23. Calculation: The
mean of a set of 7 numbers is 13. What is the sum of the numbers? (Points :
4)

24. Calculation: Find
the mode of the following test scores:
89, 78, 91, 82, 75, 89, 84, 95, 89, 93
(Points : 4)

25. Calculation: The
mean of a set of data is 174.25 and the sum of the data is 1,394. How many
numbers are in the set? (Points : 4)

26. Calculation: The
grade point averages of 10 students are listed below. Find the median grade
point average.
3.15, 3.62, 2.54, 2.81, 3.97, 1.85, 1.93, 2.63, 2.50, 2.80 (Points : 4) 
27. Calculation: Given
the following raw scores, calculate the following values: Range, Variance and
Standard Deviation, show your calculations:
Scores: 9, 7, 8, 4, 8, 8,7, 8, 9, 6, 3 (Points : 5) 
the range
a histogram the frequency table mean and standard deviation 
the same
always different possibly the same, possibly different insufficient information. 
21
21.5 24 Cannot be determined without additional information none of these 
Someone has made a mistake.
There is only one element in the population. There are no elements in the population. All the elements in the population are 25. None of the above. 
median
mode mean 
mean
median mode standard deviation none of these 
Illustrate the amount of variation in the data.
Illustrate approximately where the mean is Allow comparison with similar data Will have the exact same shape regardless of what units are used on the axes. 
ballet training
batting average runs batted in the size of the school the grades the players make in the ballet school 
36. Word Problems: Based
on the data set provided, provide a substantive narrative explanation of the
process involved in creating the frequency distribution table and the
frequency histogram. Provide as much detail as possible.
The following data represent scores of 50 students in an applied business statistics test. 72 72 93 70 59 78 74 65 73 80 57 67 72 57 83 76 74 56 68 67 74 76 79 72 61 72 73 76 67 49 71 53 67 65 100 83 69 61 72 68 65 51 75 68 75 66 77 61 64 74 (Points : 4) 
37. Word Problems: Compute
the sample mean, sample median X(M), sample range, and sample variance.
The following data represent scores of 50 students in an applied business statistics test. 72 72 93 70 59 78 74 65 73 80 57 67 72 57 83 76 74 56 68 67 74 76 79 72 61 72 73 76 67 49 71 53 67 65 100 83 69 61 72 68 65 51 75 68 75 66 77 61 64 74 (Points : 4) 
38. Word Problem: Does
the data set represent a sample or a population? If it is a sample, describe
the population from which it has been drawn.
The following data represent scores of 50 students in an applied business statistics test. 72 72 93 70 59 78 74 65 73 80 57 67 72 57 83 76 74 56 68 67 74 76 79 72 61 72 73 76 67 49 71 53 67 65 100 83 69 61 72 68 65 51 75 68 75 66 77 61 64 74 (Points : 4) 
39. Word Problems:
The number of widgets produced by 9 employees in an eight hour shift is
recorded as: 135, 120, 116, 119, 121,
125, 135, 131, 123
Find the mean number of widgets produced. (Points : 3) 
40. Word Problems:
The number of widgets produced by 9 employees in an eight hour shift is
recorded as: 135, 120, 116, 119, 121,
125, 135, 131, 123
What is the range of widgets produced given in the problem presented above? (Points : 3) 
41. Word Problems:
The number of widgets produced by 9 employees in an eight hour shift is
recorded as: 135, 120, 116, 119, 121,
125, 135, 131, 123
What is the mode of the number of widgets produced presented above? (Points : 3) 
42. Word Problems:
The number of widgets produced by 9 employees in an eight hour shift is
recorded as: 135, 120, 116, 119, 121,
125, 135, 131, 123
What is the median of the number of widgets produced presented above? (Points : 3) 
43. Critical Thinking: Two
workers on the same job show the following results over a long period of
time.
Which worker appears to be more
consistent in the time he requires to complete the job? Explain.
(Points : 5)

44. Critical Thinking:
Two workers on the same job show the following results over a long period of
time.
Which worker appears to be faster
in completing the job? Explain.
(Points : 5)

45. Critical Thinking: Explain
the differences between longitudinal and cross sectional business research
studies.
(Points : 10) 
46. Critical Thinking: Suppose
the manager of a plant is concerned with the total number of manhours lost
due to accidents for the past 12 months. The company statistician has
reported the mean number of manhours lost per month but did not keep a
record of the total sum. Should the manager order the study repeated to
obtain the desired information? Explain your answer clearly. (Points :
10)

47. Critical Thinking: Explain
why histograms and frequency polygons are used in business statistics.
(Points : 10)

48. Critical Thinking:
Which two types of probability sampling are best suited for business research
and statistical data analysis, and why? (Points : 10)

49. Critical Thinking: What
is the difference between a null hypothesis and an alternate hypothesis?
(Points : 10)

50. Critical Thinking: Explain
what is meant by the critical value of a statistical value. (Points : 10)

51. Critical Thinking: What
is the difference between a t test for independent means and a correlated t
test? (Points : 10)

52. Critical Thinking:
Explain the .05 confidence level. (Points : 10)

53. Critical Thinking: How
is a research question similar to a research hypothesis? (Points : 10)

54. Critical Thinking: Describe
each of the following statistical terms, and where applicable, define with
the appropriate equation: Range, Variance, Standard Deviation (Points : 10)

55. Critical Thinking:
Give a brief definition and an example of the following:
a. Descriptive Statistics b. Inferential Statistics (Points : 10) 
56. Critical Thinking: What
does the correlation coefficient r describe? What about r squared? (Points :
10)

57. Critical
Thinking: Describe some of the issues or concerns (at least three) which
would be addressed in deciding how to perform a statistical test of a
hypothesis: (Points : 15)

58. Critical Thinking:
Discuss the implications of: magnitude (from 0 to 1); sign ( + or ); and
probability versus causality for the Correlation Coefficient (also known as
the Pearson ProductMoment Correlation Coefficient). (Points : 15)

59. Critical Thinking:
Describe how you would develop a random sample from among students (Points :
15)


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