What type of sampling method is being used?

1. The World Health Organization wishes to estimate the mean density of people per square kilometer, they collect data on 56 countries. Justify for full credit. (a) Which of the following is the variable? (i) All countries in the world (ii) Density of people per square kilometer (iii) Set of densities of people per square kilometer of all countries (iv) Set of densities of people per square kilometer of 56 countries (b) Which of the following is the population? (i) All countries in the world (ii) Density of people per square kilometer (iii) Set of densities of people per square kilometer of all countries (iv) Set of densities of people per square kilometer of 56 countries 2. Choose the best answer. Justify for full credit. (a) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is (i) interval (ii) nominal (iii) ordinal (iv) ratio (b) In a career readiness research, 100 students were randomly selected from the psychology program, 150 students were randomly selected from the communications program, and 120 students were randomly selected from cyber security program. This type of sampling is called: (i) cluster (ii) convenience (iii) systematic (iv) stratified STAT 200: Introduction to Statistics Final Examination, Fall 2019 OL4 3 3. True or False. Justify for full credit. (a) If the variance from a data set is zero, then all the observations in this data set must be identical. (b) The median of a normal distribution curve is always zero. 4. A school district wanted to assess the effectiveness of a new math readiness program for fifth graders. The school district is divided into the individual fifth grade classrooms and 10 classrooms are randomly selected. All of the children in each of the 10 selected classrooms are assessed. (a) What type of sampling method is being used? (b) Please explain your answer. 5. A study was conducted to determine whether the mean braking distance of four-cylinder cars is greater than the mean braking distance of six-cylinder cars. A random sample of 20 fourcylinder cars and a random sample of 20 six-cylinder cars were obtained, and the braking distances were measured. (a) What would be the appropriate hypothesis test for this analysis? (i) t-test for two independent samples (ii) t-test for dependent samples (iii) z-test for population mean (iv) correlation (b) Explain the rationale for your selection in (a). Specifically, why would this be the appropriate statistical approach? 6. A study of 10 different weight loss programs involved 500 subjects. Each of the 10 programs had 50 subjects in it. The subjects were followed for 12 months. Weight change for each subject was recorded. The researcher wants to test the claim that all ten programs are equally effective in weight loss. (a) Which statistical approach should be used? (i) confidence interval (ii) t-test (iii) ANOVA STAT 200: Introduction to Statistics Final Examination, Fall 2019 OL4 4 (iv) Chi square (b) Explain the rationale for your selection in (a). Specifically, why would this be the appropriate statistical approach? 7. A STAT 200 professor took a sample of 10 midterm exam scores from a class of 30 students. The 10 scores are shown in the table below: (a) What is the sample mean? (b) What is the sample standard deviation? (Round your answer to two decimal places) (c) If you leveraged technology to get the answers for part (a) and/or part (b), what technology did you use? If an online applet was used, please list the URL, and describe the steps. If a calculator or Excel was used, please write out the function. 8. UMUC Stat Club must appoint a president, a vice president, and a treasurer. There are 10 qualified candidates. (a) How many different ways can the officers be appointed? (b) Please describe the method used and the reason why it is appropriate for answering the question. Just the answer, without the description and reason, will receive no credit. 9. Sara has eight new summer outfits. She plans to pack three of the new summer outfits in her trip to Tokyo. (a) How many different ways can the three summer outfits be selected? (b) Please describe the method used and the reason why it is appropriate for answering the question. Just the answer, without the description and reason, will receive no credit. STAT 200: Introduction to Statistics Final Examination, Fall 2019 OL4 5 10. There are 4 suits (heart, diamond, clover, and spade) in a 52-card deck, and each suit has 13 cards. Suppose your experiment is to draw one card from a deck and observe what suit it is. Express the probability in fraction format. (Show all work. Just the answer, without supporting work, will receive no credit.) (a) Find the probability of drawing a heart or diamond. (b) Find the probability that the card is not a spade. 11. Let random variable x represent the number of heads when a fair coin is tossed two times. (a) Construct a table describing the probability distribution. (b) Determine the mean and standard deviation of x. Show all work. Just the answer, without supporting work, will receive no credit. 12. Mimi plans make a random guess at 10 true-or-false questions. Answer the following questions: (a) Let X be the number of correct answers Mimi gets. As we know, the distribution of X is a binomial probability distribution. What is the number of trials (n), probability of successes (p) and probability of failures (q), respectively? (b) Find the probability that she gets at most 5 correct answers. (Round the answer to 3 decimal places. STAT 200: Introduction to Statistics Final Examination, Fall 2019 OL4 6 Refer to the following information for Questions 13 and 14. The heights of pecan trees are normally distributed with a mean of 10 feet and a standard deviation of 2 feet. 13. Show all work. Just the answer, without supporting work, will receive no credit. (a) What is the probability that a randomly selected pecan tree is between 9 and 12 feet tall? (Round the answer to 4 decimal places) (b) Find the 75th percentile of the pecan tree height distribution. (Round the answer to 2 decimal places) 14. Show all work. Just the answer, without supporting work, will receive no credit. (a) For a sample of 64 pecan trees, state the standard deviation of the sample mean (the “standard error of the mean”). (Round your answer to three decimal places) (b) Suppose a sample of 64 pecan trees is taken. Find the probability that the sample mean heights is between 9.5 and 10 feet. (Round your answer to four decimal places) 15. A survey showed that 720 of the 1000 adult respondents believe in global warming. (a) Construct a 90% confidence interval estimate of the proportion of adults believing in global warming. (Round the lower bound and upper bound of the confidence interval to three decimal places) Include description of how confidence interval was constructed. (b) Describe the results of the survey in everyday language. 16. A city built a new parking garage in a business district. For a random sample of 64 days, daily fees collected averaged $2,000, with a standard deviation of $400. STAT 200: Introduction to Statistics Final Examination, Fall 2019 OL4 7 (a) Construct a 90% confidence interval estimate of the mean daily parking fees collected. (Round the lower bound and upper bound of the confidence interval to two decimal places) Include description of how confidence interval was constructed. (b) Describe the confidence interval in everyday language. 17. The UMUC MiniMart sells five different types of teddy bears. The manager reports that the five types are equally popular. Suppose that a sample of 100 purchases yields observed counts 25, 19, 15, 17, and 24 for types 1, 2, 3, 4, and 5, respectively. Use a 0.10 significance level to test the claim that the five types are equally popular. (a) Identify the appropriate hypothesis test and explain the reasons why it is appropriate for analyzing this data. (b) Identify the null hypothesis and the alternative hypothesis. (c) Determine the test statistic. (Round your answer to two decimal places) (d) Determine the p-value. (Round your answer to two decimal places) (e) Compare p-value and significance level ?. What decision should be made regarding the null hypothesis (e.g., reject or fail to reject) and why? (f) Is there sufficient evidence to support the claim that the five types are equally popular? Justify your answer. 18. David was curious if regular excise really helps weight loss, hence he decided to perform a hypothesis test. A random sample of 5 UMUC students was chosen. The students took a 30- minute exercise every day for 6 months. The weight was recorded for each individual before and after the exercise regimen. Does the data below suggest that the regular exercise helps weight loss? Assume David wants to use a 0.05 significance level to test the claim. STAT 200: Introduction to Statistics Final Examination, Fall 2019 OL4 8 (a) What is the appropriate hypothesis test to use for this analysis: z-test for two proportions, t-test for two proportions, t-test for two dependent samples (matched pairs), or t-test for two independent samples? Please identify and explain why it is appropriate. (b) Let ?1 = mean weight before the exercise regime. Let ?2 = mean weight after the exercise regime. Which of the following statements correctly defines the null hypothesis? (i) ?1 – ?2 > 0 (?d > 0) (ii) ?1 – ?2 = 0 (?d = 0) (iii) ?1 – ?2 < 0 (?d < 0) (c) Let ?1 = mean weight before the exercise regime. Let ?2 = mean weight after the exercise regime. Which of the following statements correctly defines the alternative hypothesis? (a) ?1 – ?2 > 0 (?d > 0) (b) ?1 – ?2 = 0 (?d = 0) (c) ?1 – ?2 < 0 (?d < 0) (d) Determine the test statistic. Round your answer to three decimal places. Show all work; writing the correct test statistic, without supporting work, will receive no credit. STAT 200: Introduction to Statistics Final Examination, Fall 2019 OL4 9 (e) Determine the p-value. Round your answer to three decimal places. Show all work; writing the correct critical value, without supporting work, will receive no credit. (f) Compare p-value and significance level ?. What decision should be made regarding the null hypothesis (e.g., reject or fail to reject) and why? (g) Is there sufficient evidence to support the claim that regular exercise helps weight loss? Justify your conclusion. 19. A grocery store manager is interested in testing the claim that banana is the favorite fruit for more than 50% of the adults. The manager conducted a survey on a random sample of 100 adults. The survey showed that 56 adults in the sample chose banana as his/her favorite fruit. Assume the manager wants to use a 0.05 significance level to test the claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain why it is appropriate. (b) Identify the null hypothesis and the alternative hypothesis. (c) Determine the test statistic. Round your answer to two decimal places. Describe method used for obtaining the test statistic. (d) Determine the p-value. Round your answer to three decimal places. Describe method used for obtaining the p-value. (e) Compare p-value and significance level ?. What decision should be made regarding the null hypothesis (e.g., reject or fail to reject) and why? (f) Is there sufficient evidence to support the claim that banana is the favorite fruit for more than 50% of the adults? Explain your conclusion. 20. A business analyst believes that December holiday sales in 2016 are a good predictor of December holiday sales in 2017. A random sample of 8 toys stores produced the following data STAT 200: Introduction to Statistics Final Examination, Fall 2019 OL4 10 where x is the amount of December holiday sales in 2016 and y is the amount of December sales in 2017, in dollars. (a) Find an equation of the least squares regression line. Round the slope and y-intercept value to two decimal places. Describe method for obtaining results. (b) Based on the equation from part (a), what is the predicted 2017 December holiday sales if the 2016 December holiday sales is 6,000 dollars? Show all work and justify your answer. (c) Based on the equation from part (a), what is the predicted 2017 December holiday sales if the 2016 December holiday sales is 20,000 dollars? Show all work and justify your answer. (d) Which predicted 2017 holiday sales that you calculated for (b) and (c) do you think is closer to the true predicted 2017 holiday sales and why?

Who are the four team members, and what was the primary reason each person was selected?

n Topic 4, selections for the Southwest Transit marketing team were made and now your job is to present the recommendation to your director. Surprisingly though, a directive is issued informing management that only four people will be able to staff the team, which will of course increase the pressure finalizing the selection.Consider the vision for a successful Southwest Transit marketing team composed in Topic 4. Narrow down the team selection to four individuals for presentation to the director. Decide which strategies will be most effective for leading the agreed-upon team. Compose a PowerPoint presentation (10-12 slides), then record your 5-7-minute presentation using YouTube Video, Loom, or Zoom. On the title slide of your PowerPoint presentation, provide the link to your YouTube, Loom, or Zoom video recording that you created. Your presentation should address the following:Who are the four team members, and what was the primary reason each person was selected? How difficult was it to come to a decision regarding team selection? Which potential team member was most difficult to come to a consensus about? Why?What are the primary strengths of the team? What are its potential weaknesses? How positive is the management team about the team’s potential? Justify your answers with evidence from ” Southwest Transit Team Member Profiles.”What strategies will be most effective for motivating the team, managing conflict, and ensuring success and fostering collaboration? Cite specific motivational theories, conflict-resolution strategies, and leadership strategies in your answer.Justify how the selected team embodies the values of Conscious Capitalism how the tenet of stakeholder orientation played a role in the team selection process. Provide citations to strengthen your claims.Describe how value is created for each stakeholder, and in what ways will the team positively impact the business as a whole?You are required to use at least three academic references to strengthen and support your claims and recommendations. Ensure each content slide has supporting citations and specific examples.While APAstyle is not required for the body of this assignment, solid academic writing is expected, and in-text citations and references should be presented using APA documentation guidelines, which can be found in the APA Style Guide, located in the Student Success Center.This assignment uses a rubric. Please review the rubric prior to beginning the assignment to become familiar with the expectations for successful completion.You are not required to submit this assignment to LopesWrite.Benchmark InformationThis benchmark assignment assesses the following programmatic competency:MSL, Homeland Security and Emergency Management2.2: Evaluate Strategies for effectively leading teams and fostering collaboration.

What should Sonic’s mission be?

Marketing Plan Chapter Assignments (located in the Appendix of the textbook) for Chapter 2.The required length for these assignments is 350 words PER CHAPTERChapter 2As an assistant to Jane Melody, Sonic’s chief marketing officer, you’ve been assigned to draft a mission statement for top management’s review. This should cover the competitive spheres within which the firm will operate and your recommendation of an appropriate generic competitive strategy. Using your knowledge of marketing, the information you have about Sonic, and library or Internet resources, answer the following questions.· What should Sonic’s mission be?· In what competitive spheres (industry, products and applications, competence, market-segment, vertical, and geographic) should Sonic operate?· Which of Porter’s generic competitive strategies would you recommend Sonic follow in formulating its overall strategy?As your instructor directs, enter your answers and supporting information in a written marketing plan to document your ideas.In this instance, Sonic is a fictional cell phone company.

identify what type of critical infrastructure data collection is needed for pavement and storm water management facilities.

Week 6 discussion – CollectionAn agency has focused its system development and critical infrastructure data collection efforts on separate engineering management systems for different types of assets and is working on the integration of these systems. In this case, the agency focused on the data collection for two types of assets: water treatment and natural gas delivery management facilities. Please identify what type of critical infrastructure data collection is needed for pavement and storm water management facilities.Chapter 6 discusses the concept of correlation. Assume that An agency has focused its system development and critical infrastructure data collection efforts on separate engineering management systems for different types of assets and is working on the integration of these systems. In this case, the agency focused on the data collection for two types of assets: water treatment and natural gas delivery management facilities. Please identify what type of critical infrastructure data collection is needed for pavement and storm water management facilities.To complete this assignment, you must do the following:A) Create a new thread. As indicated above, identify what type of critical infrastructure data collection is needed for pavement and storm water management facilities.B) Select AT LEAST 3 other students’ threads and post substantive comments on those threads. Your comments should extend the conversation started with the thread.ALL original posts and comments must be substantive. (I’m looking for about a paragraph – not just “I agree.”)

What insight about the historical development of these two cultures did you gain from the comparison?

Early Medieval Cultures Essay This assignment provides you with an opportunity to discuss an insight you gained in this unit by comparing the development of one specific Islamic and one specific Christian region in 600–1000 C.E. Using examples of significant leaders, political and social structures, beliefs, and cultural products (stories, philosophies, theologies, artifacts, art, and architecture), note similarities and differences in the two cultures, and also indicate influences they share. What insight about the historical development of these two cultures did you gain from the comparison? Step 1: Review the section of the Unit V Study Guide entitled, “Be Careful When Making Historical Assumptions.” Step 2: Choose two appropriate sources, not including the textbook. At least one source must come from the CSU Online Library. The Academic Search Complete and eBook Academic Collection databases in the CSU Online Library would be good places to start your search. Resources from outside of the library should be credible and peer-reviewed by historians and cannot include Wikipedia, Biography.com, History.com, or any other .com site; resources should also not be taken from any type of message board or other encyclopedia-type sites, including those listed in the CSU Online Library research guides, which are provided for quick reference only and not for paper research. If you need additional help with using or locating information in the CSU Online Library, there are library video tutorials available on the main page of the online library under the heading “Research Guides.” Step 3: Complete your research. Choose one interesting comparison that illustrates the main point that you want to make about these cultures during this period. Gather details about your choice. Compare similar features (known as “comparing like terms”). For example, compare cities to cities, education systems to education systems, technologies to technologies, stories to stories, ideas about the nature of God to ideas about the nature of God, and other features. Make sure you complete the comparison for all features, or note why you think there is not a like term for some features. Comparison includes consideration of both similarities and differences. Here are some examples to consider: ? the promotion and use of learning by leading figures; ?the relationship between religious and political authority; ?the shaping of artifacts (leader, idea, practice, or structure) by time period and environment; ?the shaping of societies by artifacts and whether different people were affected differently; and ?the way that different elements of culture reflect power arrangements, goals, hierarchies, and/or challenges. Step 4: Prepare your introduction, including your thesis statement. A thesis is prepared after you have completed your research and includes the comparison of what you found. It should be a one- or two-sentence statement of the conclusions you drew from the comparison. Step 5: Write your essay. Your essay must be at least 500 words in length. Step 6: Reflect on how this comparison paper shaped your understanding of how to practice cultural history ethically, as discussed in the “Be Careful When Making Historical Assumptions” section of the Unit V Lesson. Write one paragraph to be placed after the concluding paragraph of your essay, reflecting on how the guidelines in the unit lesson shaped your understanding of how to use historical evidence, including artifacts, to practice cultural history ethically.

Develop a strategy proposal using the “Ends, Ways and Means” model.

Word count: minimum 1,500, maximum 2,000 (approximately 5-7 pages).2021 Iran Nuclear Test: Ends, ways and meansYou are a member of the National Security Council staff asked to recommend an appropriate United States response to the notional 2021 Iranian nuclear test crisis. Develop a strategy proposal using the “Ends, Ways and Means” model. Ensure that your actions are consistent with US policy and the state of international affairs in the notional 2021 scenario. Keep in mind that you are writing recommendations, not directions. Write from the perspective of a staff official presenting a report to the President.The paper must also have these elements accomplished:· Have I demonstrated adequate justification for each recommendation?· Have I integrated my recommendations?· Have I integrated the instruments of national power in my recommendations?

Analyze the areas that were in need of reform in American Society during the period between 1890 and 1920.

Due today•Analyze the areas that were in need of reform in American Society during the period between 1890 and 1920. Choose one specific issue to focus on.•Describe how progressives tried to resolve this issue. Were they successful? Explain why or why not.•Examine the approaches progressives took regarding American foreign policy, including the policy of Imperialism. Explain these approaches.Explain why the progressive approach to reform at home was or was not consistent with the practice of imperialism overseas.At least 250 words in length. Your post should make reference to the required materials with in-text citations. Your references and citations must be formatted according to APA style

What is the critical Chi-square value?

Randomly selected nonfatal occupational injuries and illnesses are categorized according to the day of the week that they first occurred, and the results are listed below (based on data from the Bureau of Labor Statistics). Use a .05 significance level to test the claim that such injuries and illnesses occur with equal frequency on the different days of the week. Day | Monday Tuesday Wednesday Thursday Friday _________________________________________________________ No. | 23 23 21 21 19 A) What is the critical Chi-square value? B) Calculate the test statistic. C) What is your decision/interpretation?

Should the system be built in-house, created by a contractor, purchased off-the-shelf and customized, or leased as a service? Explain your rationale.

Congratulations. Your project has been staffed and you are about to meet with the team for the first time. Initial impressions are important and you’ll need visuals for your presentation. Create a slide show (in PowerPoint or similar software) in which you address the following, in this order:1. Goals: What the project hopes to accomplish.2. Critical Success Factors: Identify at least 4 different stakeholders; for each, list at least 2 things that the stakeholder requires in order to deem the project successful.3. Acquisition strategy: Should the system be built in-house, created by a contractor, purchased off-the-shelf and customized, or leased as a service? Explain your rationale.4. Resources: For in-house development, what people/skills are required and what development lifecycle do you recommend? Otherwise, identify 3 candidate organizations that can deliver the system.5. System functions: In a table format, summarize the types of users for the system; the business reason(s) each would use the system; the ways that the system supports each of these needs; and how this support differs from the current system.6. Connectivity: Provide a diagram that shows how the system will connect to the other information systems and what data flows among them.7. Security: List the most serious cybersecurity threats and vulnerabilities of the new system. Suggest strategies to address them.8. Mobility: Identify the system’s capabilities for mobile use.Include a title and summary slide. Use one slide for each of the 8 points above. Include speaker notes or audio narration that explains each slide more fully.

Discuss the challenges the organization had that limited their profitability and/or competitiveness and how they planned to leverage Cloud Computing to overcome their challenges.

For this project, select an organization that has leveraged Cloud Computing technologies in an attempt to improve profitability or to give them a competitive advantage. Research the organization to understand the challenges that they faced and how they intended to use Cloud Computing to overcome their challenges. The paper should include the following sections each called out with a header.•Company Overview: The section should include the company name, the industry they are in and a general overview of the organization.•Challenges: Discuss the challenges the organization had that limited their profitability and/or competitiveness and how they planned to leverage Cloud Computing to overcome their challenges.•Solution: Describe the organization’s Cloud Computing implementation and the benefits they realized from the implementation. What was the result of implementing Cloud Computing? Did they meet their objectives for fall short?•Conclusion: Summarize the most important ideas from the paper and also make recommendations or how they might have achieved even greater success.Requirements:Evidence of copying from other papers or not properly citing sources could result in a score of zero.The paper must adhere to APA guidelines including Title and Reference pages. There should be at least three scholarly sources listed on the reference page. Each source should be cited in the body of the paper to give credit where due. Per APA, the paper should use a 12-point Time New Roman font, should be double spaced throughout, and the first sentence of each paragraph should be indented .5 inches. The body of the paper should be 3 – 5 pages in length. The Title and Reference pages do not count towards the page count requirements.

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