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This is the Past Exam of Business Statistics which includes Residual, Diameter, Fitted Regression, Predicts, Volume, Diameter and Height, Largest Residual, Residual Standard Deviation, Model Fit etc. Key important points are: Pareto Diagram, Longitudinal Data, Cause and Effect Diagram, Flow Diagram, Process Diagram, Company, Frequency Histograms, Stem and Leaf Diagrams, Dotplots, Sequence Plots
Typology: Exams
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Please enter all of your answers on these exam pages. There are 25 questions on this part. A Defective Question Report is attached at the back.
A) Pareto diagram B) Cause-and-effect diagram C) Flow diagram D) Deming’s process diagram E) None of the above.
A large company has two divisions. Division A has 1000 employees and Division B has 10,000 employees. The CEO wants to compare the salary distributions in the two divisions. Which of the following displays would be best for this comparison? A) Two frequency histograms B) Two relative frequency histograms C) Two stem-and-leaf diagrams D) Two dotplots E) Two sequence plots
A set of 345 accounts in a U.S. branch of your company has a mean of $1000 and a standard deviation of $50. These are given in U.S. dollars. One U.S. dollar is worth 1.45 Canadian dollars. What would the mean and standard deviation of the 345 accounts be in Canadian dollars? A) mean = 1000 Canadian dollars, standard deviation = 50 Canadian dollars B) mean = 1001.45 Canadian dollars, standard deviation = 51.45 Canadian dollars C) mean = 689.66 Canadian dollars, standard deviation = 34.48 Canadian dollars D) mean = 1450 Canadian dollars, standard deviation = 72.50 Canadian dollars E) None of the above.
The density histogram at the right displays the distribution of heights of the 220 males in a class. The mean is 71.3 inches and the standard deviation is 2.7 inches. About what percentage of these guys were 74 inches or shorter? (Notice that the distribution is quite mound-shaped.) A) 17% B) 32% C) 68% D) 84% E) 95% 60 70 80
Height
Density
Heights of Males
A) 10 B) 20 C) 30 D) 40 E) 50
A) 10 B) 20 C) 25 D) 30 E) 40
A) 20 B) 40 C) 50 D) 70 E) 80
A) longitudinal data on a categorical variable. B) cross-sectional data on a categorical variable. C) longitudinal data on a continuous variable. D) cross-sectional data on a continuous variable. E) data with both longitudinal and cross-sectional aspects.
Read Ad Did Not Read Ad Male 10 30 Female 40 20
A) True B) False
The correlation coefficient is ______________
-6.0-4.5-3.0-1.5 0.0 1.5 3.0 4.5 6.0 7.
50 40 30 20 10 0
% Change
Frequency
16.517.518.519.520.522.5 25.5 35.
Age
Density
A small dataset is given in the table at the right. Use these data to answer the next four questions. Show your work.
Two dotplots are shown at the right. Use these plots to answer the next three questions. (Do not attempt to calculate anything!)
A) True B) False
A) True B) False
A) True B) False
y y − y (^) ( y − y )^2 5 4 7 5 9
1 2 3 4 5 6 7 8 9
Data
Data
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You are only to use Minitab for this exam. Do not open any other applications. Do not check your email, etc. Keep your eyes on your own screen please! Place all of your answers on this test sheet. To avoid confusion you may want to close Worksheets and graphs when you go from one question to the next.
b) Plot these data in a sequence plot perhaps using different plotting symbols for the various months. Describe the longitudinal nature of the data using terms like random, trend, meandering, and seasonal. (You may want to use % k:\22s-008\macros\monthly)
c) Describe the distribution of Sales using the terms skewed, symmetric, and mound-shaped.
d) What are the median and interquartile range for Sales? median = ____________________
interquartile range = ________________
b) (2 pts.) Of the supper clubs, what percentage are partnerships? _________
c) (2 pts.) Of the corporate owned restaurants, what percentage are fast food restaurants? _________
Your Computer Number: _____ (01 through 28)
You are only to use Minitab for this exam. Do not open any other applications. Do not check your email, etc. Keep your eyes on your own screen please! Place all of your answers on this test sheet. To avoid confusion you may want to close Worksheets and graphs when you go from one question to the next.
b) Plot these data in a sequence plot perhaps using different plotting symbols for the various months. Describe the longitudinal nature of the data using terms like random, trend, meandering, and seasonal. (You may want to use % k:\22s-008\macros\monthly)
c) Describe the distribution of Sales using the terms skewed, symmetric, and mound-shaped.
d) What are the median and interquartile range for Sales? median = ____________________
interquartile range = ________________
b) (2 pts.) Of the supper clubs, what percentage are partnerships? _________
c) (2 pts.) Of the corporate owned restaurants, what percentage are fast food restaurants? _________