Statistics Coursework Introduction I will be examining a fictional school entitled Clementswood High School also recognised as Mayfield High School; however the information collected is real data from real students. Altogether there are 5 year groups ranging from year 7 to year 11 and 1183 students in total. This is secondary data from the Edexcel website which I will use for my investigation. Secondary data also known as desk research is when you find data through another source and do not conduct
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Final Project: Statistics II Descriptive analysis of statistical data INTRODUCTION There have always been crimes, from a treachery to an assassination. Happens in every country you can think of, and every government has to deal with it. It is really stressful to try to understand the nature of the crimes: why are they done and where could they happen next. Out of this preoccupation is that we found studies gathering data from communities; we focused on one specific crime: murders. In several
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expected rate of return of 6%, a standard deviation of returns of 30%, a correlation coefficient with the market of -0.25, and a beta coefficient of -0.5. Security B has an expected return of 11%, a standard deviation of returns of 10%, a correlation with the market of .75, and a beta coefficient of 0.5. Which security is more risky? Why? Using SML: rA= rrf + (rm – rrf)bi Security A is riskier because of its negative correlation to the market. Also its beta is negative causing to believe its risk will
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QMT 3001 BUSINESS FORECASTING TERM PROJECT Sales Revenue Forecasting of Tat Company 20.05.2014 DOKUZ EYLUL UNIVERSITY 2009432015 – MERT ALİ BOZKURT 2009432021 – BURAK CANBAY 1. INTRODUCTION Firstly, we analyzed the quarterly financial reports of Tat Company that shows us sales revenue of quarterly from 2008 to the first quarter of 2014. And then we created our data tables by using annual reports. Our aim is to forecast last three quarters of 2014 based on the sales revenues of
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Answer 1) a). The engineers may be taken as a homogeneous group and since the ministry believes that the comments depend on the engineers’ category, a stratified sampling method would be recommended. An equal composition of each category may be first selected to have a sample of 100 and then send a questionnaire through e-mail. This is due to the fact that the results are needed urgently. Assumptions * Population of engineers are homogeneous population of each type of engineers separately
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................................................................................................................................... 18 9. Scatter Plots.............................................................................................................................................................. 19 10. Covariance and Correlation Coefficient ........................................................................................................ 22 11. Linear
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Executive Summary An analysis was performed for Quick Stab Collection Agency. This agency specializes on relatively small accounts and avoids risky collections such as debtor that tends to be chronically late with payments or is known to be hostile. The collection business can be very profitable. Quick Stab Collection Agency has been known to purchase small accounts for $10.00 to collect a debt of $60.00. The profitable of this agency depend critically on the numbers of days to
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3 Methods of Data Collection 4 Results and Interpretations Descriptive Statistics 5 A. Stem and Leaf Plot 7 B. Box Plot 8 C. Histogram 9 D. Probability 11 E. 95% Confidence Interval for Mean 13 F. Scatter plot 14 G. Simple Linear Regression 15 H. Multiple Linear regression 16 I. Residual plot 17 J. Mean T-test 18 Summary and Conclusions 19 Introduction and Background In medical device manufacturing there
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experiment is mainly designed to investigate a) the relationship between the angles of rotation of the alphabetical characters and the reaction time to determine whether the letter presented is normal or reversed position and b) whether the mean of the correlation coefficient is significantly greater than zero. A group of fifty- five first year undergraduate students who are studying Psychology course were recruited in the within- subjects experiment. In this experiment, the participants were showed the alphabetical
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Multiple-Choice Questions 1. A scatter plot can illustrate all of the following except: A) The median of each of the variables. B) The range of each of the variables. C) An indication of outliers. D) Patterns of values. ANSWER: A 2. For the following scatter plot, what would be your best estimate of the correlation coefficient? A) -0.8 B) -1.0 C) -0.3 D) 0.0 ANSWER: A 3. For the following scatter plot, what would be your
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