Consider a random sample of 20 observations. The sample variance is 30.5. Construct a 95% confidence interval for ? 2

Question 1 Explain the following concepts: (a) Parameter (1 marks) (b) Stratified random sampling (3 marks) (c) Descriptive statistics (3 marks) (d) Inferential statistics (3 marks) Question 2 The following table displays data on height of students (measured in centimeters) in a Business Statistics class. The sample size consists of 30 randomly selected students for a particular class. Refer to table in question 2 in file(a) Draw a histogram to depict the data above (5 marks) (b) Compute the mean (10 marks) (c) Calculate the variance and standard deviation (10 marks) (d) Calculate the coefficient of variation (5 marks) (e) Interpret the distribution of heights as shown in your histogram (5 marks) Question 3 Part 1: Two fair dice are rolled (a) Calculate the probability that two sixes will appear? (2 marks) (b) Calculate the probability of at least one six appearing? (5 marks) Part 2 (a) A bank conducted a survey to estimate the proportion of its customers who would be interested in using a new app for mobile banking services. The bank found that 68 out of 150 customers are in favour of using the new app. Construct a (i) 95% confidence interval (10 marks) (ii) 90% confidence interval (10 marks) For the proportion of customers who are in favour of the new banking app (b) A certain security system contains 12 parts. Suppose that the probability that each individual part will fail is 0.3 and that the parts fail independently of each other. Given that at least two of the parts have failed, compute the probability that at least three of the parts have failed? (8 marks) Question 4 (a) The mean lifetime of 200 mobile phones in a sample is 1,000 hours and their standard deviation is 130 hours. µ is the mean lifetime of all the mobile phones produced. Test the hypothesis that the sample comes from a population whose mean is 1,200 hours at 1% significance level? (10 marks) (b) Consider a random sample of 20 observations. The sample variance is 30.5. Construct a 95% confidence interval for ? 2 (10 marks)

What are the challenges encountered in data collection as it applies to research?

Chapter 14: Data Collection, Testing and ObservationChapter 15: Data Collection, InterviewingRead Chapter 14 & 15 Discussion # 5 Friendly reminder – Phase 3 is dueDiscussion Question #5 (Assignment worth 1 point)What are the challenges encountered in data collection as it applies to research? What are the types of interview technique when interviewing participants? List your preferences and tell us why?*Remember APA guidelines regarding references and citations in your discussion posts.Book:Publication Manual American Psychological Association (APA) (7th ed.). 2020. ISBN-13:978-1433832161. ISBN-10: 143383216XRuth M. Tappen. (2015). Nursing Research. Advanced Nursing Research: From Theory to Practice. (2nd ed.). ISBN-13: 9781284048308. ISBN-10: 1284048306. Publisher: Jones & Bartlett Learning

How could this experiment help someone to understand criminal behavior?

In 1971, Philip Zimbardo’s The Stanford Prison Experiment demonstrated the power of the situation and the interaction between social interaction and social structure. After viewing the documentary, if you had been a guard, do you think you would have been more likely to go along with the other guards or would you have resisted or spoken up about treating the prisoners the way you would have wanted to be treated if the roles had been reversed? How could this experiment help someone to understand criminal behavior?Responses should be no less than 500 words in length and must reference specific parts of the documentaries as support for your analysis

Prepare a 5-6 page report (excluding the cover page, the reference page, and any tables and graphs), which describes the uses of business inventory control.

The textbook is Quantitative Analysis and is in attachments.Prepare a 5-6 page report (excluding the cover page, the reference page, and any tables and graphs), which describes the uses of business inventory control. You need to include at least one real world example and apply at least one inventory control method discussed in Chapter 6. Please follow the flow chart (Figure 6.1) on page 196 of the textbook to present your final findings. You may use hypothetical numbers to illustrate your analysis if you cannot find the actual data. However, you have to use some number to demonstrate your ability to apply your chosen inventory control model to a real world situation. APA format and appropriate use of section headings are required. (LO 1, 4, 5) Please copy and paste in or attach your Excel Worksheet, which is a must to receive credits for statistical analysis. You do need to analyze your own data and cannot simply cite the statistical result published else where. Please check the basic APA format checklist posted in the Announcement and the grading rubric for writing assignments in the syllabus before you submit this assignment. You may also find the discussion at Discussion Post 5a quite helpful, too.Attached also is a word document containing Walk through steps to apply ABC analysis.

What are some examples of how a lobbyist for a professional nursing organization works with nursing advocates on any given healthcare-related issue?

Nurses advocate for their patients every day. Whether collaborating with the health care team to ensure a patient’s plan of care is appropriate, connecting patients and families to community resources, or teaching a patient during discharge planning, nurses utilize a set of interpersonal skills that lend them to be natural advocates (Mason, et. al. 2021).What are some examples of how a lobbyist for a professional nursing organization works with nursing advocates on any given healthcare-related issue?300 words, 2 references(Please utilize your textbook and note chapters for week 7). Policy & Politics in Nursing and Health Care, 8th Edition.

How would you gather information about the job context and environment? Explain what sources you would use and why.

You are the HR manager for a commercial airline. You have been assigned to develop a realistic job preview for flight attendants. Your objective is to give a balanced picture of the job so that applicants will better understand what they will be asked to do. Job duties, schedules, and other facets of the job should all be well understood early in the recruiting process to avoid poor P/E fit later on.How would you gather information about the job context and environment? Explain what sources you would use and why.How could you use technology to show the positive and negative aspects of the job?Your discussion is to be submitted in 12-point Times New Roman font using APA format. You must have a minimum of two sources to support your answer.Primary response (200-word minimum). Respond to at least 2 other postings (150 words minimum each) by Sunday midnight.

Analyze the major costs and major benefits of the issue.

Assignment 5: Policy Analysis PaperDue Week 10 and worth 220 pointsIn this assignment, you will create a practical and professional document that will represent the level of work that is expected from modern professional policy analysts. Use the information from the worksheet you completed for Assignment 4 to build on for this assignment.Use the Internet and Strayer databases to research the global/international issue or challenge selected in Assignment 4 and locate professional viewpoints on the topic.There should be six main sections to the Policy Analysis Paper:Problem DefinitionIssue AnalysisProposed SolutionsStrategic RecommendationsWeaknesses and LimitationsCost–Benefit AnalysisNote: You may add sections or subsections to your Policy Analysis Paper. You may include tables and charts in the page length.Write a 5–8-page paper in which you do the following:Select one real-world policy issue and provide a description of the issue.Analyze the major costs and major benefits of the issue.Recommend three courses of action.Provide at least three to five reliable, relevant, peer-reviewed references that support the paper’s claims.Format your assignment according to the following formatting requirements:Typed, double-spaced, using Times New Roman font (size 12), with 1-inch margins on all sides.Include a cover page containing the title of the assignment, the student’s name, the professor’s name, the course title, and the date. The cover page is not included in the required page length.Include a reference page. Citations and references must follow the APA format. The reference page is not included in the required page length.The specific course learning outcome associated with this assignment is as follows:Formulate domestic and international public policy alternatives to effectively address issues and challenges.Grading for this assignment will be based on answer quality, logic/organization of the paper, and language and writing skills, using the following rubric.