QNT 561 Week 3 Individual Mystatslab Problem Set
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1. Which hypothesis, the null or the alternative, is the statusquo hypothesis?
2. A university economist conducted a study of elementary school lunch menus. During the statemandated testing period, school lunches averaged 890 calories. The economist claimed that after the testing period ended, the average caloric content of the school lunches increased/dropped significantly. Set up the null and alternative hypothesis to test the economist’s claim.
3. Suppose the mean GPA of all students graduating from a particular university in 1975 was 2.40. The register plans to look at records of graduating last year to see if the mean GPA has decreased. Define notation and state the null and alternative hypothesis for this investigation.
4. A random sample of 100 observations from a population with standard deviation 58 yielded a sample mean of 111. Complete parts a through c.
5. A final scores of games of a certain sport were compared against the final point spreads established by oddsmakers. The difference between the game outcome and point spread (called a pointspread error) was calculated for 250 games. The mean and standard deviation of the pointspread errors are = 1.7 and s = 13.1. Use this information to test the hypothesis that the true mean pointspread error for all games differs from 0. Conduct the test at α = 0.10 and interpret the result.
6. If a hypothesis test were conducted using α = 0.025, for which of the following pvalues would the null hypothesis be rejected?
7. For the α and observed significance level (pvalue) pair, indicate whether the null hypothesis would be rejected.
α = 0.10, pvalue = 0.001
8. In a test of the hypothesis H_{0}:µ = 40 versus H_{a}: µ ≠ 40, a sample of n = 50 observations possessed mean = 40.7 and standard deviation s = 3.8. Find the pvalue for this test.
9. In a study it was found that the averge age of cable TV shoppers was 55 years. Suppose you want to test the null hypothesis, H_{0}:µ = 55, using a sample of n = 60 cable TV shoppers.
10. A sample of seven mesurements, randomly selected from a normally distributed population, resulted in the summary statistics = 4.6 and s = 1.2. Complete parts athrough c.
11. A study analysis recent incidents involving terrorist attacks. Data on the number of individual suicide bombings that occurred in each of 20 sampled terrorist group attcks against a country is reproduced in the data table below. An Excel/DDXL printout is shown to the right. Complete parts a through e.
12. When planning for a new forest road to be used for tree harvesting, planners must select the location to minimize tractor skidding distance. The skidding distances (in meters) were measured at 20 randomly selected road sites. The data are given below. A logger working on the road claims the mean skidding distance is atleast 424 meters. Is there sufficient evidence to refute this claim? Use α = 0.10 / α = 0.01.
13. For the binomial sample sizes and null hypothesized values of p in each part, determine whether the sample size is large enough to meet the required conditions for using the normal approximation to conduct a valid largesample hypothesis test of the null hypothesis H_{0}: p = p_{0}. Complete parts a through e.
14. Suppose a consumer group rated 49 brands of toothpaste based on whether or not the brand carries an American Dental Association (ADA) seal verifying effective decay prevention. The results of a hypothesis test for the proportion of brands with the seal are shown to the right. Complete parts a through c.
15. In order to compare the means of two populations, independent random samples of 410 observations are selected from each population, with the results found in the table to the right. Complete parts a through e.
16. To use the tstatistic to test for a difference between the means of two populations, what assumptions must be made about the two populations? About the two samples?
17.
18. Independent random samples are selected from two populations and are used to test the hypothesis H_{0}: (µ_{1}  µ_{2}) = 0 against the alternative H_{a}: (µ_{1}  µ_{2}) ≠ 0. An analysis of 234 observations from population 1 and 310 from population 2 yielded a pvalue of 0.113. Complete parts a and b below.
19. A study was done to examine whether the perception of service quality at hotels differd by gender. Hotel guests were randomly selected to rate service items on a 5point scale. The sum of the items for each guest was determined and a summary of the guest scores are provided in the table. Complete parts a and b.
20. To determine if winning a certain award leads to a challenge in life expectancy, researches sampled 748 award winners and matched each one with another person of the same sex who was in the same profession and was born in the same era. The lifespan of each pair was compared. Complete parts a through c below.
21. A new testing method was developed to reduce a certain ratio. The data in the table show the ratios that resulted from testing six components using the standard method and the new method. Compare the two methods with a 90% confidence interval. Which method has the smaller mean ratio?
22. Consider making an interference about p_{1} – p_{2} , where there are x_{1 }successes in n_{1} binomial trails and x_{2} succeseses in n_{2} binomial trails.
23. Construct a 90% confidence interval for (p_{1} – p_{2}) in each of the following situations.
24. In auction bidding the “winner’s curse” is the phenomenon of the winning (or highest) bid price being above the expected value of the item being auctioned. A study was conducted to see if lessexperienced bidders were more likely to be impacted by the curse than superexperienced biders. The study showed that of the 180 bids by superexperienced bidders, 26 winning bids were above the item’s expected value, and of the bids by the 140 lessexperienced bidders, 31 winning bids were above the item’s expected value. Complete parts athrough d.
25. School buying is a form of aggressive behavior that occurs when a student is exposed repeatedly to negative actions from another student. In order to study the effectivenss of an antibullying policy at elementary schools, a survey of over 2,000 elementary school children was conducted. Each student was asked if he or she ever bullied another student. In a sample of 1358 boys, 745 Claimed they had never bullied another student. In a sample of 1379 girls, 966 claimed they had never bullied another student. Complete parts a through f below.
26. A study was conducted to determine the demographics of two types of product managers. Independent samples of n_{1} = 99 consumer/commercial group, 41%(_{1}) of the product managers are 40 years of age or older; in the industrial group, 55%(_{2}) are 40 or more years old. Make an interference about the differnce between the true proportions of consumer/commercial and industrial product managers who are at least 40 years old.
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What are differences between dependent and independent samples? Provide examples. What are implications for determining the tests used to analyze data?
..

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What is the value of performing hypotheses tests to solve problems related to business and operations management? Provide specific examples.
..

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1. Consider the pairs of measurements shown to the right.
2. Researchers investigated the effect of tablet surface area to volume on the rate at which a drug is released in a controlledrelease dosage. For six similarly shaped tablet..

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What is the importance of pretesting questions and instruments? What are risks of not doing this? Provide an example.
..

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does technological advancement affect the ability to collect data? Provide examples. Does this advancement increase the chance for errors? Explain.
..

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1. Researchers conducted a survey of a representative sample of over 1,000 drivers. Based on how often each driver engaged in road behaviour, a road rage score was given. The drivers were also grouped by annual income. The data were subjected to an analysis of varian..

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You observe female sales representatives having lower customer defections than male sales representatives. What concepts and constructs would you use to study this phenomenon? How might the concepts or constructs relate to explanatory hypotheses? Explain.
..

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In your organization’s management development program, there was a heated discussion between people who claimed that theory is impractical and not effective, and others who claimed that effective theory is the most practical approach to problems. What position would you take and why?
..

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1. Which hypothesis, the null or the alternative, is the statusquo hypothesis?
2. A university economist conducted a study of elementary school lunch menus. During the statemandated testing period, school lunches averaged 890 calor..

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What is the purpose of sampling? What are some concerns and dangers of sampling? How important is the sample design to data validity? Explain. Provide an example where a sample might misrepresent data validity. For example, reflect on the current political campaign and the pollsters!
..

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What are some examples of operational definitions in research design within your profession? For example, in the education field, graduation rate and retention rate are important operational definitions to measure progress of students. Likewise other professions have common metrics and defin..

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1. A random sample of 87 observations produced a mean = 25.7 and a standard deviation s = 2.6.
2. Health care workers who use latex gloves with glove powder on a daily basis are particularly susceptible to developing a latex al..

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When would you use Chebyshev’s theorem and the empirical rule in business? How are they calculated? Provide one reallife example that requires Chebyshev’s theorem and one that requires the empirical rule.
..

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How may variance and standard deviation be applied to a realworld businessrelated problem? Provide a specific application in which these measures are useful.
..

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1. What is statistics?
2. Explain the difference between descriptive and inferential statistics.
3. Explain the difference between qualitative and quantitative data.
4. &nb..

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QNT 561 Week 1 Assignment Statistics Concepts and Descriptive Measures Instructions (Financial Data)
QNT 561 Week 1 Assignment Statistics Concepts and Descriptive Measures Instructions (Consumer Food)
QNT 561 Week 2 Case Study MBA Schools in Asia Pacific (2 Papers)
..

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This Tutorial contains 2 Sets of Report and Presentation
Complete the cumulative Business Research Report in approx. 1,500 words by collaborating with your team to include the following:
Revised tables or figures based on prior instructor feedback
The description or interpretati..

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This Tutorial contains 2 different sets
Administer the survey.
In a paper in the APA format describe the following:
Determine the sample process including sample contact, survey distribution, and survey collection.
Organize, prepare, and describe the data.
Include tabl..

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Create a Microsoft® Excel® spreadsheet with the two variables from a dataset for your choosing.
Analyze the data with MegaStat®, StatCrunch®, Microsoft® Excel®or other statistical tool(s), including:
(a) Descriptive stats for each numeric variable
and
(b) Histogram for e..

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This Tutorial contains 2 different sets
Create a draft of the survey.
Conduct a pilot pretest having another Learning Team in the class to provide feedback for your team. Chet will create a message thread for each team to place their survey in the Class Discussion Tab.&nb..

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This Tutorial contains 2 different Papers
Develop a plan for your Business Research Project in approx. 800 words.
Revise the research questions based on instructor feedback from the previous week.
Identify population and samples for your research.
Describe w..

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Identify an organization or business for your Learning Team research project.
Describe the products or services it provides.
Identify a problem or dilemma faced by the organization that could be addressed by research.
Discuss the problem as a team..

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Identify an organization from any member in your Learning Team or an organization with which your team is familiar. If an actual company is used, disguise its name with a pseudonym.
Identify one independent variable and one dependent variable based on the business. Operation..

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Chapter 13:
Ex 6) The owner of Maumee FordMercuryVolvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.
a. If we wan..

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Chapter 10:
Ex 2) A Sample of 36 observations is selected from a normal population. The sample mean is 12, and the population standard deviation is 3. Conduct the following test of hypothesis using the 0.01 significance level.
EX. 10) Given the following hypotheses:
..

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Chapter 8:
Ex 2) The following is a list of 29 hospitals in the Cincinnati (Ohio) and Northern Kentucky region. The hospitals are identified by numbering them 00 through 28. Also included is whether the hospital is a general medical/surgical hospital (M/S) or a specialty hospital (..

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Chapter 5:
Ex 4) A large company must hire a new president. The Board of Directors prepares a list of five candidates, all of whom are equally qualified. Two of these candidates are members of a minority group. To avoid bias in the selection of the candidate, the company decides to..

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Chapter 2:
Ex 4) Two Thousand three hundred frequent business travelers are asked which Midwestern city they prefer: Indianapolis, Saint Louis, Chicago or Milwaukee. 388 liked Indianapolis best, 450 liked Saint Louis, 1212 liked Chicago and the remainder prefers Milwaukee. Develop ..

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Chapter 18:
EX.2) Listed Below is the number of movie tickets sold at the Library CinemaComplex, in thousands, for the period from 2001 to 2013. Compute a fiveyear weighted moving average using weights of 0.15, 0.15, 0.25, 0.16, and 0.29, respectively. Describe the trend in yield..

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Review the Case Study: MBA Schools in AsiaPacific and the Case Study: MBA Schools in AsiaPacific data set.
Prepare a 1,050word managerial report for your boss.
Use the following questions for guidelines and directions on what to include in the report:
1. &nbs..

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Purpose of Assignment
The purpose of this assignment to orient students to the key concepts in statistics. This assignment will introduce students to the language of statistics. Students will also get a chance to warmup on evaluating some basic descriptive statistics using Excel® prior to th..

QNT 561 Week 1 Assignment Statistics Concepts and Descriptive Measures Instructions (Financial Data)
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Purpose of Assignment
The purpose of this assignment to orient students to the key concepts in statistics. This assignment will introduce students to the language of statistics. Students will also get a chance to warmup on evaluating some basic descriptive statistics using Excel® prior to th..

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Individual Paper Signature Assignment
About Your Signature Assignment
This signature assignment is designed to align with specific program student learning outcome(s) in your program. Program Student Learning Outcomes are broad
statements that describe what students should know and be abl..

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Week 5
Learning team Paper
Part A : OneSample Hypothesis Testing Cases
Purpose of Assignment
The purpose of this assignment is to develop students' abilities to combine the knowledge of descriptive statistics covered in Weeks 1 and 2 and onesample hypothesis testing to mak..

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Week 5
Individual Paper
· Spicy Wings Case
Purpose of Assignment
The purpose of this assignment is to develop students' abilities to combine the knowledge of descriptive statistics covered in Weeks 1 and 2 and onesample hypoth..

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Individual Paper
Purpose of Assignment
The purpose of the assignment is to develop students' abilities in using datasets to apply the concepts of sampling distributions and confidence intervals to make management decisions.
Assignment Steps
Resources: Micros..

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Learning team paper
Purpose of Assignment
This assignment has two cases. The first case is on expansion strategy. Managers constantly have to make decisions under uncertainty. This assignment gives students an opportunity to use the mean and standard deviation of probability distribut..

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Individual Paper:
Purpose of Assignment
The purpose of this assignment is for students to learn how to make managerial decisions using a case study on Normal Distribution. This case uses concepts from Weeks 1 and 2. It provides students an opportunity to perfor..

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1. James Desreumaux, VP of Human Resources of American First Banks (AFB), is reviewing the employee training programs of AFB banks. His staff randomly selected personnel files for 100 tellers in the Southeast Region and determined that their mean training time ..

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QNT 561 Final Exam Guide (New, 2017)
QNT 561 Week 1 Assignment Statistics Concepts and Descriptive Measures Instructions (Financial Data)
QNT 561 Week 1 Assignment Statistics Concepts and Descriptive Measures Instructions (Consumer Food)
QNT 561 Week 2 Case Study..

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Individual Paper Signature Assignment
About Your Signature Assignment
This signature assignment is designed to align with specific program student learning outcome(s) in your program. Program Student Learning Outcomes are broad
statements that describe what students should know and be abl..

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After reading chapter 12, explain how ANOVA could help to explain the association between two variables. Give an example.
After reading chapter 13, how ANOVA could help to understand the expansion of the hypothesis testing of two variables?
After reading chapter 18, ..
