Questions:
Question 1. 1. What type of research uses numeric measurement data? Part
Question 2. 2. What type of research uses a research hypothesis? Part
Question 3. 3. What type of research does not use statistical data analysis? Part
Question 4. 4. What type of research preempts all other types of research endeavors? Part
Question 5. 5. Business research is a type of ________________ inquiry. Part
Question 6. 6. What are the three main types of non-probability sampling used in business research? Part
Question 7. 7. In a situation where in a confidence level .01 what percent of the measurement results are left to chance? Part
Question 8. 8. What is the most important ingredient in a statistical testing procedure? Part
Question 9. 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? Part
Question 10. 10. What type of t test seeks to determine whether or not a relationship exists in one sample over two conditions? _______________ Part
Question 11. 11.
Which of the examples below represent the Ratio level of scaling?
A) A high temperature of 83 degrees Fahrenheit
B) A survey result that 24 students work full time, 36, Part time.
C) Bill is consistently rated most effective communicator of his group.
D) Gallup says that 60% of the voters support the incumbent.
E) Pick up three pounds of ground beef please.
F) Patty acts as expected based on her first-born family position.
G) Seattle at an altitude of 67 feet is higher than Death Valley at an altitude of â€" 120.
H) The door is 37 inches wide, the door frame is 36 inches wide.
Part
B, C and F
D, E and G
C, F and H
A, E and H
Question 12. 12. Select those issues that only relate to selecting a specific statistical test. (Do not select items common to all tests or not applying to statistical tests.) Part
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
Question 13. 13.
Which of the following apply to Populations?
A) parameter
B) “Roman†letters, i.e.: x, s
C) A bounded, defined complete group (people, objects, etc.) having something in common to be described in its totality
D) “Greek†letters, i.e.: μ, σ
E) One or more subsets of a larger defined group, used to represent the larger group
F) 170 Republicans selected randomly from King County voter records
G) All Democrats in the state of Washington (totality)
Part
A, B, E
B, C, D
C, D, G
E, F, G
Question 14. 14.
As an Argosy student, you are designing a training program to help develop team cohesiveness in a healthcare facility. You have a before and after test which measures behaviors indicating team cohesiveness. For this scenario, which of the following represents the Null hypothesis?
A) H1: There is a significant difference in the teaming behavior before and after the training.
B) H0: There is no significant difference in the teaming behavior before and after the
training.
C) H1: There is no significant difference in the teaming behavior before and after the
training.
D) H0: There is a significant difference in the teaming behavior before and after the training
Part
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
Question 15. 15. The sole purpose of business research is to increase profit margins?
True
False
Question 16. 16. When conducting business research the investigator must make his/her opinions known about possible results? True
False
Question 17. 17. When one is conducting business research the most important factor is developing a reasonable researchable question?
True
False
Question 18. 18. Business research should always begin with an alternate hypothesis?
True
False
Question 19. 19. The null hypothesis states that a difference, effect or relationship exists in a research situation? (Points : 1)
True
False
Question 20. 20. The confidence level expresses the degree of certainty that an interval will include the actual value of the population parameter? (Points : 1)
True
False
Question 21. 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? Part
Question 22. 22. Calculation: The range of a set of numbers is 1,362. The greatest number is 2,172. What is the least number? Part
Question 23. 23. Calculation: The mean of a set of 7 numbers is 13. What is the sum of the numbers? Part
Question 24. 24. Calculation: Find the mode of the following test scores: 89, 78, 91, 82, 75, 89, 84, 95, 89, 93 Part
Question 25. 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? Part
Question 26. 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 Part
Question 27. 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 Part
Question 28. 28. A large mass of data can best be summarized pictorially by means of: Part
the range
a histogram
the frequency table
mean and standard deviation
Question 29. 29. For a symmetric distribution, the mean and median are Part
the same
always different
possibly the same, possibly different
insufficient information.
Question 30. 30. A distribution of 6 scores has a median of 21. If the highest score increases 3 points, the median will become Part
21
21.5
24
Cannot be determined without additional information
none of these
Question 31. 31. If you are told a population has a mean of 25 and a variance of 0, what must you conclude? Part
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.
Question 32. 32. Which of the following measures of central tendency tends to be most influenced by an extreme score? Part
median
mode
mean
Question 33. 33. Which of the following is not a measure of central tendency? Part
mean
median
mode
standard deviation
none of these
Question 34. 34. A graphical presentation may accomplish ALL BUT which of the following objectives? Part
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.
Question 35. 35. A coach in a large high school thinks that ballet training will improve the batting performance of his baseball team. He decides to have a randomly selected half of the team take six weeks of ballet training before the baseball season begins, while the other half does not take such training. He will then compare the season batting averages of group A (those with ballet training) and group B (those without ballet training) by comparing the mean of group A with the mean of group B.
An independent variable is: Part
ballet training
batting average
runs batted in
the size of the school
the grades the players make in the ballet school
Question 36. 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 Part
Question 37. 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 Part
Question 38. 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 Part
Question 39. 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. Part
Question 40. 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? Part
Question 41. 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? Part
Question 42. 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? Part
Question 43. 43. Critical Thinking: Two workers on the same job show the following results over a long period of time.
Worker A Worker B
Mean time of completing the job (minutes) 30 25
Standard deviation (minutes) 6 4
Which worker appears to be more consistent in the time he requires to complete the job? Explain.
Part
Question 44. 44. Critical Thinking: Two workers on the same job show the following results over a long period of time.
Worker A Worker B
Mean time of completing the job (minutes) 30 25
Standard deviation (minutes) 6 4Which worker appears to be faster in completing the job? Explain.
Part
Question 45. 45. Critical Thinking: Explain the differences between longitudinal and cross sectional business research studies.
Part
Question 46. 46. Critical Thinking: Suppose the manager of a plant is concerned with the total number of man-hours lost due to accidents for the past 12 months. The company statistician has reported the mean number of man-hours 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. Part
Question 47. 47. Critical Thinking: Explain why histograms and frequency polygons are used in business statistics. Part
Question 48. 48. Critical Thinking: Which two types of probability sampling are best suited for business research and statistical data analysis, and why? Part
Question 49. 49. Critical Thinking: What is the difference between a null hypothesis and an alternate hypothesis? Part
Question 50. 50. Critical Thinking: Explain what is meant by the critical value of a statistical value. Part
Question 51. 51. Critical Thinking: What is the difference between a t test for independent means and a correlated t test? Part
Question 52. 52. Critical Thinking: Explain the .05 confidence level. Part
Question 53. 53. Critical Thinking: How is a research question similar to a research hypothesis? Part
Question 54. 54. Critical Thinking: Describe each of the following statistical terms, and where applicable, define with the appropriate equation: Range, Variance, Standard Deviation Part
Question 55. 55. Critical Thinking: Give a brief definition and an example of the following:
a. Descriptive Statistics
b. Inferential Statistics Part
Question 56. 56. Critical Thinking: What does the correlation coefficient r describe? What about r squared? Part
Question 57. 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: Part
Question 58. 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 Product-Moment Correlation Coefficient). Part
Question 59. 59. Critical Thinking: Describe how you would develop a random sample from among Argosy students Part