(2) (c) Explain briefly why mathematical models can help to improve our understanding of real-world problems. (2) Jan 2001 3) A fair six-sided die is rolled. The random variable Y represents the score on the uppermost‚ face. (a) Write down the probability function of Y. (b) State the name of the distribution of Y. (2) (1) Find the value of (c) E(6Y
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| Statistics 101 Report | The Kentucky Milk Case Study | | | | Preliminary Analysis 2a) Figure 1: X as a Data Object X is a data frame as derived from the program R shown above in Figure 1. There are 274 observations of 11 variables. The number of observations is obtained from the number of rows while the number of variables is obtained from the number of columns. 2b) Figure 2: Creating a sub-data frame from X Figure 3:Sub-data frame from X Figure 2 shows a screenshot
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Teacher Good Enough? By Ester J. de Jong & Candace A. Harper Introduction More and more teachers find themselves teaching students from increasingly diverse linguistic and cultural backgrounds. In a recent report (National Center for Education Statistics‚ 2002)‚ 42% of the teachers surveyed indicated that they had English Language Learners (ELLs) in their classroom‚ but only 12.5% of these teachers had received more than eight hours of professional development specifically related to ELLs (NCES
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Exercise 17 Problems - Part I: Answers 1. The temperature contrast between the equator and the Arctic region is greatest in the winter‚ because the Arctic region is furthest away from the Sun during that time. 2. (a) The one region of the world where the hypothetical isotherm pattern is actually observed is in the Southern Hemisphere‚ starting at approximately 30° S. (b) The hypothetical pattern is seen here‚ because the oceanic and atmospheric circulations in this region constantly run from
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Q1. (a) ‘Statistics is the backbone of decision-making’. Comment. Ans.(a) Due to advanced communication network‚ rapid changes in consumer behavior‚ varied expectations of variety of consumers and new market openings‚ modern managers have a difficult task of making quick and appropriate decisions. Therefore‚ there is a need for them to depend more upon quantitative techniques like mathematical models‚ statistics‚ operations research and econometrics. Decision making is a key part of our day-to-day
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life. Though my career progression in the banking system including joining the RBI was not as a statistician‚ I must confess that the analytical ability and articulation skill based on sound knowledge of statistics‚ which I developed during my academic career both as a student and teacher of Statistics at BHU‚ greatly
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variables with the same distribution‚ then we can make the approximation A ≈ An = 1 n n Xk . k=1 The strong law of large numbers states that An → A as n → ∞. The Xk and An are random and (depending on the seed‚ see Section 9.2) could be different each time we run the program. Still‚ the target number‚ A‚ is not random. We emphasize this point by distinguishing between Monte Carlo and simulation. Simulation means producing random variables with a certain distribution just to look at them
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Statistics is the study of the collection‚ organization‚ analysis‚ interpretation‚ and presentation of data. It deals with all aspects of this‚ including the planning of data collection in terms of the design of surveys and experiments. The word statistics‚ when referring to the scientific discipline‚ is singular‚ as in "Statistics is an art. "This should not be confused with the word statistic‚ referring to a quantity (such as mean or median) calculated from a set of data‚ whose plural is statistics ("this
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Mid-Exam for Statistics 2 for IBA 12 March 2013; duration: two hours It is NOT allowed to use a graphical‚ programmable calculator; only a simple pocket calculator is allowed. Write the answers to the questions on the attached answering form (on pages 7 and 8); only the answers‚ no derivations. (For this midterm‚ only the final answers to each individual question count.) This mid-exam contains 8 pages: 4 pages with information and three exercises‚ 1 page with a few formulae and 2 pages for
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Exercises and Problems XACC/291 Principles of Accounting II Week 2 February 8‚ 2015 Exercise E9-1 The following expenditures relating to plant assets were made by Spaulding Company during the first 2 months of 2011 (determine cost of the plant acquisitions). 1. Paid $5‚000 of accrued taxes at time plant site was acquired. 2. Paid $200 insurance to cover possible accident loss on new factory machinery while the machinery was in transit. 3. Paid $850 sales taxes on new delivery
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