Statistics for Business and Economics (13th Edition)

13th Edition

ISBN: 9780134506593

Author: James T. McClave, P. George Benson, Terry Sincich

Publisher: PEARSON

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Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative p…

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Chapter 9.4, Problem 9.63ACA

Anticorrosive behavior of steel coated with epoxy. Organic coatings that use epoxy resins are widely used for protecting steel and metal against weathering and corrosion. Researchers at National Technical University (Athens. Greece) examined the steel anticorrosive behavior of different epoxy coatings formulated with zinc pigments in an attempt to find the epoxy coating with the best corrosion inhibition (Pigment & Resin Technology, Vo. 32, 2003). The experimental units were flat rectangular panels cut from steel sheets. Each panel was coated with one of four different coating systems. S1, S2, S3, and S4. Three panels were prepared for each coating system. (These panels are labeled S1-A, S1-B, S1-C. S2-A, S2-B.....S4-C.) The characteristics of the four coating systems are listed at the bottom of the page. Each coated panel was immersed in deionized and deaerated water and then tested for corrosion. Because exposure time is likely to have a strong influence on anticorrosive behavior the researchers attempted to remove this extraneous source of variation through the experimental design. Exposure times were fixed at 24 hours, 60 days, and 120 days. For each of the coating systems, one panel was exposed to water for 24 hours, one exposed to water for 60 days, and one exposed to water for 120 days in random order. The design is illustrated in :he accompanying table.

Exposure Time	Coating System/Panel Exposed
24 hours	S1-A, S2-C, S3-C, S4-B
60 days	S1-C, S2-A, S3-B, S4-A
120 days	S1-B, S2-B, S3-A, S4-C

Following exposure, the corrosion rate (nanoamperes per square centimeter) was determined for each panel. The lower the corrosion rate, the greater the anticorrosion performance of the coating system. The data are shown in the next table. Are there differences among the epoxy treatment means? If so, which of the epoxy coating systems yields the lowest corrosion rate?

Chapter 9.4, Problem 9.63ACA, Anticorrosive behavior of steel coated with epoxy. Organic coatings that use epoxy resins are widely , example 1

Coating systems characteristics for Exercise 9.63

Chapter 9.4, Problem 9.63ACA, Anticorrosive behavior of steel coated with epoxy. Organic coatings that use epoxy resins are widely , example 2

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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Chapter 9.4, Problem 9.62ACI

Chapter 9.5, Problem 9.64LM

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Chapter 9 Solutions

Statistics for Business and Economics (13th Edition)

Ch. 9.1 - What are the treatments for a designed experiment...Ch. 9.1 - What are the treatments for a designed experiment...Ch. 9.1 - What is the difference between an observational...Ch. 9.1 - What are the experimental units on which each of...Ch. 9.1 - Identifying the type of experiment. Brief...Ch. 9.1 - Drafting NFL quarterbacks. Refer to the Journal of...Ch. 9.1 - Corporate sustainability and firm characteristics....Ch. 9.1 - Prob. 9.8ACB Ch. 9.1 - Can money spent on gifts buy love? Refer to the...Ch. 9.1 - Value perceptions of consumers. Refer to the...

Ch. 9.1 - Value perceptions of consumers (contd). Refer to...Ch. 9.1 - Reducing stress in livestock transported to...Ch. 9.1 - Mixed gender decision-making groups. In business,...Ch. 9.1 - Testing a new pain-reliever tablet. Paracetamol is...Ch. 9.2 - Use Tables V, VI, VII, and VIII in Appendix D to...Ch. 9.2 - Find the following probabilities: a. P (F 3.48)...Ch. 9.2 - Consider dot plots 1 and 2 shown below. Assume...Ch. 9.2 - Refer to Exercise 9.17. Conduct a two-sample...Ch. 9.2 - Refer to Exercises 9.17 and 9.18. Complete the...Ch. 9.2 - A partially completed ANOVA table for a completely...Ch. 9.2 - The data in the next table resulted from an...Ch. 9.2 - Prob. 9.22ACB Ch. 9.2 - Prob. 9.23ACB Ch. 9.2 - Prob. 9.24ACB Ch. 9.2 - Prob. 9.25ACB Ch. 9.2 - Making high-stakes insurance decisions. The...Ch. 9.2 - Contingent valuation of homes in contaminated...Ch. 9.2 - Study of recall of TV commercials. Do TV shows...Ch. 9.2 - Do the media influence your attitude toward...Ch. 9.2 - Homework assistance for accounting students. Refer...Ch. 9.2 - Prob. 9.31ACI Ch. 9.2 - Is honey a cough remedy? Pediatric researchers...Ch. 9.2 - Prob. 9.33ACI Ch. 9.2 - Banning controversial sports team sponsors....Ch. 9.3 - Consider a completely randomized design with k...Ch. 9.3 - Prob. 9.36LM Ch. 9.3 - Prob. 9.37LM Ch. 9.3 - Prob. 9.38LM Ch. 9.3 - Prob. 9.39LM Ch. 9.3 - Prob. 9.40ACB Ch. 9.3 - Evaluation of flexography printing plates. Refer...Ch. 9.3 - Guilt in decision making. The effect of guilt...Ch. 9.3 - Prob. 9.43ACB Ch. 9.3 - Prob. 9.44ACB Ch. 9.3 - Prob. 9.45ACI Ch. 9.3 - Study of recall of TV commercials. Refer to the...Ch. 9.3 - Prob. 9.47ACI Ch. 9.3 - Prob. 9.48ACI Ch. 9.3 - Prob. 9.49ACI Ch. 9.4 - A randomized block design yielded the following...Ch. 9.4 - Prob. 9.51LM Ch. 9.4 - A randomized block design was used to compare the...Ch. 9.4 - Prob. 9.53LM Ch. 9.4 - Prob. 9.54ACB Ch. 9.4 - Peer mentor training at a firm. Peer mentoring...Ch. 9.4 - Prob. 9.56ACB Ch. 9.4 - Interactive video games and physical fitness. Wii...Ch. 9.4 - Prob. 9.58ACB Ch. 9.4 - A new method of evaluating health care research...Ch. 9.4 - Prob. 9.60ACI Ch. 9.4 - Prob. 9.61ACI Ch. 9.4 - Stress in cows prior to slaughter. What is the...Ch. 9.4 - Anticorrosive behavior of steel coated with epoxy....Ch. 9.5 - Suppose you conduct a 4 3 factorial experiment....Ch. 9.5 - Prob. 9.65LM Ch. 9.5 - The partially complete ANOVA table given next is...Ch. 9.5 - Prob. 9.67LM Ch. 9.5 - The next table gives data for a 2 2 factorial...Ch. 9.5 - Suppose a 3 3 factorial experiment is conducted...Ch. 9.5 - Dynamics of the buyer-seller relationship. An...Ch. 9.5 - Prob. 9.71ACB Ch. 9.5 - Prob. 9.72ACB Ch. 9.5 - Prob. 9.73ACB Ch. 9.5 - Prob. 9.74ACB Ch. 9.5 - Temptation in consumer choice. Are you willing to...Ch. 9.5 - Commercial eggs produced from different housing...Ch. 9.5 - Prob. 9.77ACI Ch. 9.5 - Eyewitnesses and mugshots. Criminologists...Ch. 9.5 - Impact of flavor name on consumer choice. Do...Ch. 9 - What is the difference between a one-way ANOVA and...Ch. 9 - Explain the difference between an experiment that...Ch. 9 - What are the treatments in a two-factor...Ch. 9 - Why does the experimentwise error rate of a...Ch. 9 - A completely randomized design is used to compare...Ch. 9 - An experiment employing a randomized block design...Ch. 9 - The following table shows a partially completed...Ch. 9 - Prob. 9.89ACB Ch. 9 - Prob. 9.90ACB Ch. 9 - Impact of paper color on exam scores. A study...Ch. 9 - Study of mutual fund performance. Mutual funds are...Ch. 9 - Study of mutual fund performance. Refer to...Ch. 9 - Prob. 9.94ACB Ch. 9 - Prob. 9.95ACB Ch. 9 - Prob. 9.96ACB Ch. 9 - Bakers vs. brewers yeast. The Electronic Journal...Ch. 9 - A managerial decision problem. A direct-mail...Ch. 9 - Ethics of downsizing. A major strategic...Ch. 9 - Absentee rates at a jeans plant. A plant that...Ch. 9 - Effectiveness of sales closing techniques....Ch. 9 - Prob. 9.103ACI Ch. 9 - Prob. 9.104ACI Ch. 9 - Managers trust and job-related tension. Research...Ch. 9 - Testing the effectiveness of supermarket sales...Ch. 9 - Prob. 9.107ACI Ch. 9 - Prob. 9.108ACI Ch. 9 - Pollutants at a housing development. Polycyclic...Ch. 9 - Explain why both of the situations n Activity 8.1...

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