Gen Combo Ll Applied Statistics In Business & Economics; Connect Access Card

6th Edition

ISBN: 9781260260632

Author: David Doane, Lori Seward Senior Instructor of Operations Management

Publisher: McGraw-Hill Education

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Textbook Question

Chapter 11, Problem 38CE

Instructions: You may use Excel, MegaStat, Minitab, JMP, or another computer package of your choice. Attach appropriate copies of the output or capture the screens, tables, and relevant graphs and include them in a written report. Try to state your conclusions succinctly in language that would be clear to a decision maker who is a nonstatistician. Exercises marked * are based on optional material. Answer the following questions, or those your instructor assigns.

a. Choose an appropriate ANOVA model. State the hypotheses to be tested.
b. Display the data visually (e.g., dot plots or line plots by factor). What do the displays show?
c. Do the ANOVA calculations using the computer.
d. State the decision rule for α = .05 and make the decision. Interpret the p-value.
e. In your judgment, are the observed differences in treatment means (if any) large enough to be of practical importance?
f. Given the nature of the data, would more data collection be practical?
g. Perform Tukey multiple comparison tests and discuss the results.
h. Perform a test for homogeneity of variances. Explain fully.

The Environmental Protection Agency (EPA) advocates a maximum arsenic level in water of 10 micrograms per liter. Below are results of EPA tests on randomly chosen wells in a suburban Michigan county. Research question: Is the mean arsenic level affected by well depth and/or age of well?

Chapter 11, Problem 38CE, Instructions: You may use Excel, MegaStat, Minitab, JMP, or another computer package of your choice.

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Chapter 11, Problem 37CE

Chapter 11, Problem 39CE

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Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include: Mileage (mpg) Number of Cylinders (cyl) Displacement (disp) Horsepower (hp) Research: Google to understand these variables. Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp Mean Median First Quartile (Q1) Second Quartile (Q2) Third Quartile (Q3) Fourth Quartile (Q4) 10th Percentile 70th Percentile Skewness Kurtosis Document Your Results: In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command” In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…

Chapter 11 Solutions

Gen Combo Ll Applied Statistics In Business & Economics; Connect Access Card

Ch. 11.2 - Using the following Excel results: (a) What was...Ch. 11.2 - Using the following Excel results: (a) What was...Ch. 11.2 - In a one-factor ANOVA with sample sizes n1 = 5, n2...Ch. 11.2 - In a one-factor ANOVA with sample sizes n1 = 8, n2...Ch. 11.2 - Prob. 5SE Ch. 11.2 - Prob. 6SE Ch. 11.2 - Instructions for Exercises 11.5 through 11.8: Use...Ch. 11.2 - Prob. 8SE Ch. 11.3 - Consider a one-factor ANOVA with n1 = 9, n2 = 10,...Ch. 11.3 - Consider a one-factor ANOVA with n1 = 6, n2 = 5,...

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