Stat 1350 - Elementary Statistics Essays - Econometrics, Bathing

Stat 1350 - Elementary Statistics Essays - Econometrics, Bathing Stat 1350 - Elementary Statistics Jigsaw Review for Test 2 Chapters 14-15 and 17-20 Group 1 - Regression - Chapters 14-15: 1. From Rex Boggs in Australia comes an unusual data set: before showering in the morning, he weighed the bar of soap in his shower stall. The weight goes down as the soap is used. The data appear in Table II.3 (weights in grams). Notice that Mr. Boggs forgot to weigh the soap on some days. [pic] A. Plot the weight of the bar of soap against day. [pic] [pic] B. Is the overall pattern roughly straight-line? Based on your scatterplot, is the correlation between day and weight close to 1, positive but not close to 1, close to 0, negative but not close to -1, or close to -1? Explain your answer. The overall pattern is roughly straight-line. The correlation would be close to -1 since the points are very close to lying on a straight decreasing line. C. Find the equation for the least-squares regression line for the data in Table II.3 and write it below. Draw the regression line on your scatterplot from the previous exercise. y = 133.18 - 6.31x 1) Explain carefully what the slope b = -6.31 tells us about how fast the soap lost weight. Every day the weight of the soap decreases 6.31 grams. 2) Mr. Boggs did not measure the weight of the soap on Day 4. Use the regression equation to predict that weight. y = 133.18 - 6.31(4) = 107.94 grams 3) Use the regression equation in the previous exercise to predict the weight of the soap after 30 days. Why is it clear that your answer makes no sense? What's wrong with using the regression line to predict weight after 30 days? After 30 days the soap would weigh - 56.12 grams which is physically impossible. Extrapolation is risky!!! Group 2 - Probability - Chapters 17-20 1 Choose a student at random from all who took Stats 1350 in recent years. The probabilities for the student's grade are [pic] a) What must be the probability of getting an F? b) What is the probability that a student will fail the class (earn D or F)? c) If you choose 5 students at random from all those who have taken Stats 1350, what is the probability that all the students chosen got a B or better? d) To simulate the grades of randomly chosen students, how would you assign digits to represent the five possible outcomes listed? e) Use lines 101-102 from the Random Number Table to simulate 10 repetitions of randomly choosing 5 students and use your results to estimate the probability that all five students chosen got a B or better. How does this compare to the probability you calculated in part (c)? Explain. 2. Rotter Partners is planning a major investment. The amount of profit X is uncertain, but a probabilistic estimate gives the following distribution (in millions of dollars): [pic] What is the expected value of the profit? Interpret this value in a complete sentence in the context of the problem. Group 3 - Probability - Chapters 17-20 (continued) 1. Choose a student in grades 9 to 12 at random and ask if he or she is studying a language other than English. Here is the distribution of results: [pic] a) Explain why this is a legitimate probability model. b) What is the probability that a randomly chosen student is studying a language other than English? (c) What is the probability that a randomly chosen student is studying French, German, or Spanish? 2. Abby, Deborah, Mei-Ling, Sam, and Roberto work in a firm's public relations office. Their employer must choose two of them to attend a conference in Paris. To avoid unfairness, the choice will be made by drawing two names from a hat. (This is an SRS of size 2.) (a) Write down all possible choices of two of the five names. These are the possible outcomes. (b) The random drawing makes all outcomes equally likely. What is the probability of each outcome? (c) What is the probability that Mei-Ling is chosen? (d) What is the probability that neither of the two men (Sam and Roberto) is chosen? Group 4 - Probability - Chapters 17-20 (continued) 1. Are Americans interested in opinion polls about the major issues of the day? Suppose that 40% of all adults are very interested in such

Current Event Paper Research Example | Topics and Well Written Essays - 1000 words

Current Event - Research Paper Example This mainly affects consumers since the prices of commodities go on the rise and money becomes scarcer. The value of money in the affected states declines and therefore, a lot of money can only afford remarkably few commodities (Von, 2006). It is not easy to detect inflation as we can detect other things like drought. Once inflation has occurred, it puts away investors, and they prefer to invest in other states where the likelihood of making profits is higher with fewer risks of their businesses collapsing. This is in line with Buttonwood’s arguments. It even results to release of fewer goods and services into the market since raw materials are unavailable or the cost is too high. Customers may end up lacking particularly essential commodities or getting them at exaggerated prices. Inflation may be because of different things. Buttonwood article gives mixed reactions from economists. The article confirms that inflation might be as a result of hoarding of essential commodities that are in high demand. However, the main cause of inflation is the government activities, Buttonwood confirm. In cases where the government prints excess money, when it releases it in to circulation, aiming to deal with a certain crisis it raises inflation instead. Increased supply of money results to decline in the value of money reducing the prices of commodities and raising inflation (Voitovich, 1995) Customers are among those directly affected by profit margins. A raised profit margin increases the prices of commodities, and this affects the quantity that the consumer purchases. High profit margins can help maintain a business in the market, but this is only possible if their particular goods are in high demand (Von, 2006). Failure to have high demands, the company fails to realize its set goal, hence may end up not affording to pay its workers, and therefore only resolves to lay them off. According to Robinson (2007), unemployment means further decline in the products consump tion fewer sales and therefore this only favors the competitors of the declining business. International lending and national debts by the third world may be a leading cause of inflation. The developing countries borrow funds from the developed ones and pay them off with heavy interests (Sandmo, 2011). To deal with the debts they developing governments overtax their consumers to raise revenue and this result to increased prices of commodities reducing affordability. The citizens carry the burden of buying goods at unreasonably high prices. This is usually exploitation of the developing countries by the already developed ones. Article relation to economics Scheidel (2007) in support of Buttonwood (2012) article adds that another cause of inflation may be political instabilities within states. In cases of involvement into wars, the environment is usually not conducive for producers and therefore this means shortages in the supply of commodities. He argues that shortages in supply mean hiked prices that are unaffordable with the limited finances available. For example, when U.S.A attacked Iraq, this caused political instability in Iraq and hence affected the supply of petroleum products to the entire world. Supply of oil drastically declined and therefore this caused global inflation, that shortage affected every country. This has also happened in African countries after the supply of oil by Libya was

HIMS650 Article Critique Assignment Example | Topics and Well Written Essays - 250 words

HIMS650 Article Critique - Assignment Example It is focused on figuring out the reasons for following problems in order to dive deeper. Qualitative research includes participations, observations, interviews and group discussions. Quantitative research is focused at the quantification of the data. With the help of quantitative research, different variables such as behaviors, opinions and attitudes can be assessed. Mixed research on the other hand is a mixture of both methods. The authors performed a quantitative research in the method. There are many advantages as well as disadvantages for selecting this method. Using the quantitative research helped the authors to evaluate the actual percentage of informed people in their area. They used statistics to reach their result and collected fast outcomes with the help of statistically valid random models. However, the disadvantage of this method is the limited ability of acquiring answers. For example, in the research, they focused on the survey collection of health workers at eight hospitals. It excluded out all the other departments which might have improved their research. The research could be carried out better with a mixed research method. It would help the authors evaluate why they received their results as provided. If they found that the results were lower than expected, a mixed research method could have helped them figure out the reason why the findings were lower than their expectations. Albano, L., Matuozzo, A., Marinelli, P., & Di Giuseppe, G. (2014). Knowledge, attitudes and behaviour of hospital health-care workers regarding influenza A/H1N1: A cross sectional survey. BMC Infectious Diseases, 14(1), 1-13.

Contemporary Management issue (Emaad) Essay Example | Topics and Well Written Essays - 2500 words

Contemporary Management issue (Emaad) - Essay Example These rules and principles are called ethical theories. Ethics and values differ in that ethics are acquired from philosophical theories while values are acquired informally through valuing process of socialization. For something to be considered to be a value it must have the three key components; freely chosen, the prize and acted upon. Nowadays the world is considered a global market hence the term Globalization which means that business around the world is reduced into borderless units where trade moves freely from border to border. However, globalization has influenced the erosion of business ethics. The global economy can be referred to as the removal of barriers to trade and investments and the unprecedented international mobility of capital. Sustainability is the ability of a business to meet its demand and supply in present and also in future, is an important aspect for business ethics. Businesses need to use resources meaningful so as not to affect future generation needs ( Crane & Matten, 2003). The case under consideration is the case against big tobacco companies i.e. Philip Morris, Reynolds, and Liggett on the safety of their products. These companies are being accused of knowingly selling harmful products such as cigarettes which cause lung cancer to consumers. They advertise their products to the general public especially targeting the youth and hiding the fact that the products are not healthy safe. They have also hindered various meaningful researches to determine the safety of their products and failed to produce freely safe products. Thus, the U.S. Department of Justice (DOJ) gathered evidence and filed a suit against these companies for violating the Racketeer-Influenced and Corrupt Organizations Act, hence they operated as outlaw companies since 1953. The DOJ also accused the companies of putting up advertisements that showed nicotine was not an addictive substance while they controlled the addictive nature of cigarettes to capture more and more customers. At the end of the assignment the following objectives will have been achieved. A good knowledge base and understanding on the various business ethics and moral issues. The duties of businesses to consumers and the theories involved. Also, discussion of other related theories to duties of organizations to consumers. To develop an international understanding of various business concepts by knowing the various norms and ethics of business involved. Be able to ethically reason when handling business related problems. Organization Duties to Consumers: It is worldwide accepted that businesses premises around the world cannot exist without the consumers. Thus organizations have an important role in ensuring it gives its consumers better and quality goods and services. They should avoid various malpractices like wrong labeling of products, untrue advertisements that are extremely exaggerated, adulteration (that is producing inferior products), and hoarding (hiding goods to create a shortage so as to raise the commodity prices). Consumers also have a right to demand better services and quality goods. The consumers need to be protected also from various businesses malpractices. Notably organizations which take consideration on the consumers usually prosper much than those who do not (Derry et al, 1989). The consumer has the right to choose whether to purchase or not to purchase a given product before examining it. Consumer interests usually

Spending on Advancing the Arts is the Proper use of Public Resourses :: essays research papers

"As long as people in a society are hungry or out of work or lack the basic skills needed to survive, the use of public resources to support the arts is inappropriate——and, perhaps, even cruel——when one considers all the potential uses of such money." Although I understand that the mercy that the speaker shows to the people experiencing starvation and unemployment, by asserting that the government should spend more money on the jobless and hungry people rather than squandering money on arts, I have to stand out that it is unwise to exclude art from using of public resources by just considering the starvation and survival problems faced by a minority of people. Admittedly, eliminating poverty is definitely deemed to be one of the ambitious missions of our society in a long run for we are not merciless humankind to witness so many people struggling with the housing problem and starvation. However, if a country ties up all its capital in solving starvation and unemployment problems and has little incentive to invest in art industry, with considering art as unnecessary luxuries, I would rather put it under the label of a refugee camp instead of a country. Every country has its own traditional culture. The essence of traditional art is to illustrate the national culture to the people all over the world in its unique artistic way. Why do we human beings distinct from other creatures in the world? We will never be satisfied with only enough food and safe shelter but starve for art which illuminates our life in the darkness and frustration. It is we humans who have a heart opens and seeks for arts forever. We know how to appreciate art and we dese rve this. Take Van Gogh as an example, he would rather quiet his stomach with painting than go out and find something to eat. He couldn’t live without his painting while he endured hungriness. Therefore we should be determined to foster the development of art for the majority in the society is waiting to enjoy life in ideological field aside from satisfied life necessities. We feel more fulfilled when we get something to communicate with our heart. We hear the echo of our heart. In the second place, is art really a kind of luxury and money consuming? Are the antique buyers billionaires who just interested in the antique itself? Actually not, in most of cases, it is the huge profit that drives many smart investors to heed on the antiques and cautiously pour their money in the realm of antique collectibles.

Crimminal Detection Essay

â€Å"Criminal investigations, in the standard case, are oriented towards cracking unsolved crime, identifying perpetrators, launching prosecutions, proving guilt at trial and bringing offenders to justice† (Paul Roberts in Tim Newburn et al, 2007: 95). How are criminal detection and/or investigation moulded and shaped by political, social and/or cultural forces? Criminal detection and proceedings never exist or function independently, the system, as a whole is an inherently complex network of interacting parties, procedures and forces. The shaping of criminal detection by both social and political forces arguably has positive and negative implications for the efficiency and effectiveness of the criminal justice system. The role and influence of information as knowledge or data shapes the investigation socially, there is a reliance on them to solve or reconstruct the crime in the most accurate way possible. The control of policy and legislation over the investigation both facilitates and constrains the pursuit of justice within the criminal justice system. The lack of research, transparency and understanding of investigative practices has resulted in a number of miscarriages of justice that evidently illustrate that politics has a substantial influence on the criminal detection and investigation process. Criminal detection and investigation is inevitably shaped by its social surroundings, as the nature of crime scene investigation has progressed and changed throughout history the external influences have also changed â€Å" criminal proceedings inevitably reflect their broader social environment â€Å" (Williams & Johnson, 2007). The reactive nature of criminal investigation calls for the collection of information in the form of data and knowledge. Knowledge is based around roles of individuals at the crime scene, potentially having beneficial and adverse effects on shaping the outcom e of the investigation. Police have the power to establish a crime scene under Parts 7 of Law Enforcement (Powers and Responsibilities Act 2002 (NSW) however can failure to recognize and do just that. The recognition of a crime scene and the first respondents actions can shape the remainder of the investigation, failure to establish a crime scene can result in the loss of evidence and loss of potential witnesses â€Å"the sooner the recording of the scene begins, the more confident the crime scene examiner (and the investigator) can be in their perspectives and opinions regarding the event (Garrison 2003:73). Furthermore the effective control of a crime scene inregards to roles, coordination and order is shaped by the relationships and understandings between relevant parties. Not understanding the chain of command, policies and procedures can be problematic as each separate party acting as sole entities can result in a an inefficient crime scene and wasted resources. The reliance on expert opinion in today’s society is reflected in criminal detection, â€Å"evidence law requires opinions about forensic interpretation to be presented by a person with specialized knowledge based on training, study or experience that substantially or wholly supports the opinion.† (Gans and Urbas, 2002) However consequently there are issues of relevance, over extended expertise and disagreements or differing opinions on evidence presented. It is normal for reports to encourage the production of reconstruction account of the actions of suspects of crime without indicating how it was made possible, it is formulated general matter based on accumulation professional experts (Williams & Johnson, 2007). Problems with exerts is further extended by the relationship they may have with other parties such as police, pressure and anxiety on forensic scientist to make findings of certainty can result in the misinterpretation or intentional or unintentional obscuring of facts. â€Å"relevant body samples were obtained, their secure transportation to a laboratory, their analysis and the detection and recording of DNA profiles can all come under scrutiny in the court process.† (Gans and Urbas, 2002) The law under Police investigation and questioning powers – Part 9 of †¨Law Enforcement (Powers and Responsibilities) Act 2002 †¨(NSW) stipulates the way information can be gained from individuals however statutory safeguards such as the ‘right to remain silent’ and human nature (unclear memory or description) can result in false or fragmented information. The corroboration or falsification of knowledge obtained through interviews with suspects, witnesses, victims and experts is done through the collection of knowledge through data. Criminalistics and trace-centred forensics is motivated by â€Å" the desire to overcome the ambiguities and interpretative flexibility inherent in human perception† Burney and Pemberton (2013). Data is obtained through the collection of samples of blood, hair, finger prints etc. Data as a means of detection is grounded in Locard’s (1910) theory that if two or more items come into contact, there will be a transfer of material between the two. Development in technology has resulted in an  increased reliance on detection through forensic science measures such as DNA profiling and fingerprint analysis, with DNA featuring in Australian cases from 1989 to the present-day. (Freckelton & Selby 2002,) Forensic evidence and DNA matching from the scene can help to confirm suspicion if there is a posit ive match or insinuate innocence if the match is negative. As in a larger societal context there is an assumption that science deluges ‘ the truth’ in a criminal detection process this can have detrimental affects and has results in cases of miscarriages of justice â€Å"In Australia there have also been several prominent miscarriages of justice, including convictions based substantially on questionable scientific evidence (Carrington et al. 1991). DNA is not always relevant to cases and does not automatically correlate to guilt for example the presence of semen does not prelude rape, as the issue is based on consent. Criminal detection and investigation is shaped by the political landscape in which it exists. The polices, regulations and expectations set by the government and criminal justice system affect the manner is which the investigation is carried out there is a â€Å" background were biometric technologies have been eagerly embraced by the government, and where claims have been made about their efficiency and authorit y† (Williams & Johnson, 2007). The law both constrains and facilities the pursuit for justice in regards to investigation. There is a need for police to find those responsible for criminal actions and protection of the public but also maintain a balance with individual liberties and human rights legislation. The manner in which policing is shaped by policy is evident in the investigative process of obtaining DNA. Police are bound by the Crimes (Forensic Procedures) Act 2000 (NSW), under which they are able to obtain DNA from individuals in various forms through both ‘intimate’ and ‘non-intimate’ procedures. Magistrates can ultimately overall individuals who do not consent to testing, resulting in intrusive procedures and breach’s of privacy all in the pursuit if justice. The political landscape further affects the investigation process through the procedures surrounding the presentation of DNA in courts. DNA evidence can and has been misinterpreted by the Jury and the Magistrate, for example R v Doheny and Adams [1997] 1 Cr App R 369. Prosecutor’s fallacy evidently depicts the issue power and influence of DNA in regards to sentencing and the need to reach a conviction â€Å"an error in relation to  probabilities that usually favors the prosecution. The forensic scientist could make the error in presenting DNA evidence by misrepresenting its probative value.† (Australian Law Reform Commission, 44.28) Polices in regard to presenting DNA need to reflect the complexity and interpretive nature of criminal forensics. Politics significantly shapes the criminal investigative process, evidently not always in a positive way. There is an understandable need to protect the community, however the issues in retrieving and presenting samples of DNA raise serious concerns of human rights issues and politics shaping criminal investigation in an undesirable way. The criminal justice system does not operate in a vacuum; it is influenced by its surroundings in both a political and social way. Evidently individuals participating in the criminal detection and investigative process are influenced by their professional relationships, roles and duties they have. The collection of data to reconstruct crimes presents issues with establishment, control and coordination of crimes scenes and how the effectiveness and efficiency is shaped by the interaction of relevant individuals. Technology’s influence and prominent position within society and everyday life unmistakably influences the criminal detection process. With a shift towards relying on new technologies such as DNA analysis and finger printing to provide the ‘truth’. Furthermore the political context in which the investigation and detection process exist plays a major role. External political pressure to prosecute affects the investigative process. Politics shapes the way in which police can carry out their job, they are both constrained and facilitated by the law. in the same context individual liberties and rights are subject to manipulation during the investigative process in the search for justice. Social and political forces influence the criminal investigation and detection process in a multifaceted and complicated way, which changes as the external environment changes. Bibliography Australian Law Reform Commission (ALRC), Australian Health Ethics Committee (AHEC) of the National Health and Medical Research Council (NHMRC) Essentially Yours: The Protection of Human Genetic Information in Australia (ALRC Report 96), Part 44.28 May 2003 Burney, I and Pemberton, N ‘Making space for criminalistics: Hans Gross and fin-de- siecle CSI’, Studies in History and Philosophy of Biological and Biomedical Sciences 44: 16-25. 2013 Carrington, K., Dever, M., Hogg, R., Bargen, J. & Lohrey, A. (eds) , Travesty: Miscarriages of Justice, Academics For Justice, Kensington, New South Wales. 1991 Gans, J and Urbas, G ‘†DNA Identitifcation in the Crimminal Justice System No.226 Trends and Issues in the Criminal Justice System † Australian Institute of Criminology, May, 2002 http://www.aic.gov.au/documents/A/8/7/%7BA8774CDA-3A9A-4445-9D88-583757A48003%7Dti226.pdf Garrison D ‘Crime Scene Investigation as a Patrol Function’, Law & Order 51(11), 70–3, 2003 Freckleton, I. & Selby, H. (eds.) , Expert Evidence (looseleaf), Lawbook Co., Sydney. 2002 Locard’s (1910) University of Lyons, France, developed what is known as the Locard Exchange Principle in 1910 Williams, R and Johnson, P (2007) â€Å"Trace biometrics and criminal investigations† in Tim Newburn, Tom Williamson & Alan Wright (eds) (2007) H andbook of Criminal Investigation, Willan Publishing, UK, pp 357-380.

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