Learn by DoingIn this activity, you will investigate the first question related to the study described below.Some features of this activity may not work well on a cell phone or tablet. We highly recommend that you complete this activity on a computer.Here are the directions and grading rubric for the Learn by Doing discussion board exercises.A list of StatCrunch directions is provided at the bottom of this page.CONTEXTClinical depression is a recurrent illness requiring treatment and often hospitalization. Nearly 50% of people who have an episode of major depression will have a recurrence within 2-3 years. Being able to prevent the recurrence of depression in people who are at risk for the disease would go a long way to alleviate the pain and suffering of patients.During the 1980's the federal government, through the National Institutes of Health (NIH), sponsored a large clinical trial to evaluate two drugs for depression. There were 3 treatment groups. Patients received either Imipramine (Imip), Lithium (Li), or a Placebo (Pl). Researchers randomly assigned patients to one of the 3 treatment groups and followed them for 2-4 years to track any recurrences of depression.(Prien et al., Archives of General Psychiatry, 1984).VARIABLESHospt: Which hospital the patient was from: Labeled 1, 2, 3, 5 or 6Treat: 0=Lithium; 1=Imipramine; 2=PlaceboOutcome: 0=Success 1=Failure (recurrence of depression)Time: Number of weeks until a recurrence (if outcome=1) or until study ended (if outcome=0)AcuteT: How long the patient was depressed before the start of the current study, measured in daysAge: Age in yearsGender: 1=Female 2=MaleDATAIf you have not done so already, download the depression datafile (as always, if a login box opens, just close it and then download the file). Then upload the file in StatCrunch.PROMPTWe will analyze the data to answer the 1st research question: Which of the drugs (if either) was more successful in preventing the recurrence of depression relative to the placebo?In the previous lab-preparation activity, we determined that we will analyze the data using a two-way table and conditional percentages.Use StatCrunch to produce a two-way contingency table. (directions)Copy the table in your StatCrunch output window and paste it in your initial discussion post. (directions)After you paste the content of the your StatCrunch output window into your discussion post, keep the table titled Contingency table results: and delete the Chi-Square results: table.Analyze the data in your two-way table by finding appropriate conditional percentages. Write each conditional percentage as a ratio (e.g. 25 out of 40) and as a percentage (e.g. 25/40 = 62.5%). Then write a sentence that explains the meaning of the percentage in the context of the research question.Draw a conclusion. Based on this study, which drug was the most effective in preventing the recurrence of depression? Support your conclusion using conditional percentages.LIST OF STATCRUNCH DIRECTIONSEach link will open in a new window. To return to this discussion, either close the new tab or select the tab for this discussion.Create Your Stats-Class Folder in Canvas (You only need to do this once.)Purchase StatCrunch (You only need to do this once.)Open StatCrunchDownload Excel Data FileUpload Excel Data File to StatCrunchDownload StatCrunch Output Window (no screenshots; please use these directions)Upload Files into Your Stat-Class Folder in CanvasEmbed Pictures in a Discussion Post (no attachments; please use these directions)Create a Two-way Contingency Table with DataCopy & Paste a StatCrunch TableHere is a PDF document with all StatCrunch directions (Links to an external site.).

I started the assignment which I have attached. It is really rough. I need to get a good grade on this to save my grade in the class!Critical Thinking: Quality at A1 HotelsA1 Hotels operates luxury hotels throughout the world. Recently, motivated by some incidents that appeared in the news, they have been concerned about the quality of service. The company has been giving the following survey to its clients after their stay:How would you rate the quality of your room? Select one.Good(G), Poor(P)How would you rate the quality of your food? Select one.Good(G), Poor(P)How would you rate the quality of your service? Select one.Good (G), Poor(P)Any customer who answered “Poor” to at least one of the three questions above is considered to be “dissatisfied.” Traditionally, 40% of customers have been dissatisfied.A1 Hotels would like to see if the recent level of customer satisfaction has changed. Therefore, 200 survey responses were recently chosen at random for analysis. The complete data set is in the file named Hotels.Managerial ReportPrepare a report (see below) for A1 Hotels that summarizes your assessment of customer satisfaction. Be sure to include the following seven items in your report.To summarize the data, compute the proportion of all clients thatAnswered “Poor” to room quality.Answered “Poor” to food quality.Answered “Poor” to service quality.What do these three proportions tell you about customer satisfaction at A1 hotels? What graphical displays of data would you use to understand or explain the results of the survey?What is the point estimate of the proportion of all recent clients who were “dissatisfied?” Develop the 92% confidence interval for the proportion of all recent clients who were “dissatisfied.” Interpret what the confidence interval tells you about the proportion of all recent clients who were “dissatisfied.” What is the corresponding margin of error? How can the margin of error be decreased?Develop the 92% confidence interval for the proportion of all recent clients who answered “Poor” to room quality. Interpret what the confidence interval tells you about the proportion of all recent clients who answered “Poor” to room quality. What is the corresponding margin of error? How can the margin of error be decreased?Develop the 92% confidence interval for the proportion of all recent clients who answered “Poor” to food quality. Interpret what the confidence interval tells you about the proportion of all recent clients who answered “Poor” to food quality. What is the corresponding margin of error? How can the margin of error be decreased?Develop the 92% confidence interval for the proportion of all recent clients who answered “Poor” to service quality. Interpret what the confidence interval tells you about the proportion of all recent clients who answered “Poor” to service quality. What is the corresponding margin of error? How can the margin of error be decreased?Conduct a hypothesis test, using both the p-Value Approach and the Critical Value Approach, to determine if the proportion of all recent clients is more dissatisfied than the traditional level of dissatisfaction. Use α = 0.08 level of significance. Do not forget to include the correctly worded hypothesis and show all of the steps required to conduct the hypothesis test.What would be possible effects of a lower and then of a higher level of significance?What other hypothesis tests would you use to better understand hotel customer satisfaction?What advice would you give A1 Hotels based upon your analysis of the data?What is the magnitude of the improvement (if any)?How can this study be improved?Write a report that adheres to the formatting and APA expectations outlined on the Citing & APA Resources page (Links to an external site.) in the CSU-Global Writing Center. As with all written assignments at CSU-Global, you should have in-text citations and a reference page.Submit your Excel file in addition to your report.Requirements:Paper must be written in third person.Your paper should be four to five pages in length (counting the title page and references page) and cite and integrate at least one credible outside source. The CSU-Global Library (Links to an external site.) is a great place to find resources.Include a title page, introduction, body, conclusion, and a reference page.The introduction should describe or summarize the topic or problem. It might discuss the importance of the topic or how it affects you or society as a whole, or it might discuss or describe the unique terminology associated with the topic.The body of your paper should answer the questions posed in the problem. Explain how you approached and answered the question or solved the problem, and, for each question, show all steps involved. Be sure this is in paragraph format, not numbered answers like a homework assignment.The conclusion should summarize your thoughts about what you have determined from the data and your analysis, often with a broader personal or societal perspective in mind. Nothing new should be introduced in the conclusion that was not previously discussed in the body paragraphs.Include any tables of data or calculations, calculated values, and/or graphs associated with this problem in the body of your assignment.Document formatting, citations, and style should conform to the Citing & APA Resources page (Links to an external site.). A short summary containing much that you need to know about paper formatting, citations, and references is contained in the New Sample APA Paper (Links to an external site.). In addition, information in the CSU-Global Virtual Library under the Writing Center/APA Resources tab (Links to an external site.) has many helpful areas (Writing Center, Writing Tips, Template & Examples/Papers & Essays, and others).

A z score of 0 occurs at a point beyond 75% of all scores true or false