Complex Statistics Problems with Elaborate Answers : Page - 48

Data DescriptionUse your data set and Stata (or other econometrics packages) to answer the following questions.1. (a) For each of the variables hrwage, union, and hours, what is the average, the standard deviation, the minimum value, and the maximum value in your data set?(b) What is the number of observations in your data set?2. (a) Generate a new variable lwage as the (natural) logarithm of hrwage. Label this variable.(b) What percentage of in...

Course Code   :  STATS 255

Course Title   :  optimisation and data-driven decision making

Ref style  :  Not Selected

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For this question we will be using the BreastCancer data set from the mlbench library. To load the data into R, simply load the library, and then type: data("BreastCancer", package = "mlbench"). Once the data is loaded, we recommend removing the Id attribute, since this has no value for classification: BreastCancer$Id = NULL. Information about the data set can be found by typing ?BreastCancer into the console. (a) Set the seed of the rand...

Thematic Analysis and Qualitative StatisticsQualitative statistics: thematic analysis 1. Provide a link to the article you have selected. List the comments you have chosen, the key themes you identify and the number of times they occur from the comments 2. Describe the themes you identified and the key features that make the theme recognisable (words, metaphors, emotional language, etc.) Probability and statistics fundamentals 3. Given the...

Confounding Variables in a Study of College GraduatesQuestion 1 A study of college graduates involves three variables: income level, job satisfaction, and one-way commute times to work. List some ways the variables might be confounded. (Select all that apply.) People might be very satisfied with their career as long as the income is high. One-way commute times may be long because affordable housing is distant from the job.People with who are ...

Calculating Cumulative Incidence for Different Levels of Exercise per WeekThe table depicts the results of a cohort study assessing the association between hours of exercise per week with 5-year incidence of myocardial infarction (MI) in a cohort study of 3,000 adults. Hours of exercise per week MI Cases Non-cases Total at Risk > 5 hours 300 790 1,090 ≥ 3 hours – 5 hours 210 700 910 < 3 hours 450 550 1,000 Total 960 2,040...

Questions The WA_HR_Training.csv file records information about the costs of HR training courses in a company. The information include in which year a course cost occurs (i.e., the Year column), for which position a course cost occurs (i.e., the Position column), for which department a course cost was spent (i.e., the Department column), etc. Use IBM Cognos Analytics to create a dashboard, and answer the HR manager’s following questions:...

VariablesData For this problem set you will need to load the candidate.RData workspace. You will be using the data frame called c and later t. Imagine that you are a researcher with that theory that predicts a relationship between the attractiveness of political candidates in the United States and their vote percentage margin of victory. You have gathered information on a random sample of 100 candidates from survey responses and other data so...

Data Envelopment Analysis TechniqueYou need to write a summary report on the efficiency of the operations of your case study organization(s) for one of its stakeholders. You should not assume that the stakeholder understands the Data Envelopment Analysis technique and so will need to explain it to the reader (but should only include detailed computer output in the appendix). Overall the report should be 2000 words ±200 words. The case...

Task 1Task 1 Analyse the key sources and flows of data that are collected, processed, stored and taken into account in the organisation’s decision-making process. Your analysis must include: • A statement of all the current financial and non-financial data the organisation uses in its decision making; • An analysis of data integrity and identified gaps; • A map between business functions and data sources. Task 2 ...

Problem 1: Determining the Mean Amount of Water in 1-Gallon Bottles1. A bottled water distributor wants to determine whether the mean amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company is actually 1 gallon. You know from the water bottling company specifications that the standard deviation of the amount of water per bottle is 0.02 gallon. You select a random sample of 50 bottles, and the...

Statistical Hypothesis Testing for Marketing ResearchDiscussion In the research process for Frito-Lay Company, many different numerical questions were raised regarding Frito-Lay products, advertising techniques, and purchase patterns among Hispanics. In each of these areas, statistics—in particular, hypothesis testing—plays a central role. Using the case information and the concepts of statistical hypothesis testing, discuss the fo...

Motivating the MemoTask: 2)Write 1-4 sentences to motivate the memo. This can be used to discuss why the issue is important and, if applicable, whom it may affect. 3)Identify your target population if it is not immediately clear from the introduction. 4)Write a hypothesis statement reflecting what it is you are researching for this memo.  The statement does not need to be formally written, but your position should be clear and succinct.&...

College Male Students’ Heights1. Suppose College male students’ heights are normally distributed with a mean of µ = 69.5 inches and a standard deviation of σ =2.8 inches a. If one male student is randomly selected, find the probability that his height is less than 65.2 inches or greater than 71.2 inches.  b. How tall is Mauricio if only 30.5% of students are taller than him (2 decimal places)? c. How tall is Mik...

Communter Flight: Normal DistributionQuestion 1 With a small plane, the cargo weight (passengers and luggage) is crucial to the efficiency of the flight. Suppose an airline runs a commuter flight that takes 40 passengers. They know that the weights for typical customers on this flight have an approximately normal distribution with a mean of 70 kg and a standard deviation of 10 kg. The weights of typical luggage per person have an approximately ...

Part OneTask 1: Data pre-processing and data exploration  a. Use Pandas to load data b. Merge all the data with “quality” labels between 6-10 into Class 1 and similarly form  c. Report the number of features and number of rows in each class d. Choose an attribute and generate a boxplot for the two pre-defined classes. e. Show one scatter plot, that is, one feature against another feature. It is your choice to show ...