T-tests For Independent And Related Samples Essay Example for Free

T-tests For Independent And Related Samples Essay Research Problem   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   With the increased violence that occurs in our society, it is a reality that most children on social welfare or those who have been placed in foster care have had negative experiences. Some children need to be counseled and psychologically helped in order to regain their sense of self and to help them cope with the difficulties that lie ahead of them. The most evident problems that these children have are in terms of their education and schooling. Despite the efforts of social welfare to help them get the education they need, most children drop out of high school. This study would like to determine the difference in the graduation rates of children in foster care who received counseling and those who did not receive counseling. Research Question   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Is there any difference in the graduation rates of children in foster care who had received counseling compared to those who did not? Hypothesis: Null hypothesis: There is no significant difference in the graduation rates of children in foster care whether they received counseling or not. Alternative hypothesis: There is a significant difference in the graduation rates of children in foster care when they received counseling compared to those who did not. Independent variable: Counseling sessions Dependent variable: Graduation rate (high school) Statistical Design: For this study, the appropriate statistical design is the related samples design (within groups) since the goal is to determine whether counseling sessions significantly increased or decreased the graduation rates of children in foster care which satisfies the assumption of the related sample t-test measures. Effect size: The effect size between the two means would indicate the degree or level of the difference between two groups, it could be high, moderate or low effect which would also indicate just how significant the difference between the two means are from each other. A probability value would not be able to clearly point out just how big the difference is. Table 1 t-test Result t df p.05 Graduation rate (with counseling vs without counseling) 2.69 73 .009 N = 30; ES = .60 Table 1 indicates that children in foster care who had received counseling were found to significantly have higher rates of graduation than those who have not received counseling. The t value (2.69) was found to be statistically significant (p.05), thus we reject the null hypothesis and accept the alternative hypothesis that children in foster care are more likely to graduate if they had received counseling. It was also found that the effect size for this result was .60 which is according to Cohen (1988) is of medium degree. This would mean that the difference in the graduation rates for the two groups may be statistically significant but the difference is actually not so big that other factors may actually come into play with why children who receive counseling have better graduation rates. Statistics N = 30 Mean 1 = 14.75; SD = 6.03 Mean 2 = 10.74; SD = 6.69 t = 2.69 df = 73 p = .009

Its the End of the World as We Know it, and I Feel Fine :: essays research papers

It's the End of the World as We Know it, and I Feel Fine Earl. It rhymed with girl. He always took a lot of heat for that. But that was before the Easter egg. The extraordinary Easter egg. Earl’s extraordinary Easter egg†¦ He got it as a gift from his mean cousin Katie that never was and never will be nice to him (she kept teasing his name). It looked like nothing special to him. Probably just some chocolate inside but it definitely wasn’t an ordinary egg. This egg contained extra-terrestrial contents that have enormous potential. As he unwrapped the cheap aluminum wrapper encasing the egg, a little note fell out. At first, what seemed like an encoded language scribbled on the note moved its lines around and became American English. This is the pod of life and destruction. In the pod contains objects from the seventh dimension. Its purpose is to continue the mere existence of the universe by destroying much of it. 3,465,735,180,261 EUs received  Ã‚  Ã‚  Ã‚  Ã‚  32 EUs needed Note: The reader of this is cursed with the occupation of feeding the pod the energy it needs to complete its objective. Nice prank Kate but this is too stupid to be funny or scary, Earl thought. As he was about to throw it out, he noticed that the egg felt warm to his touch. He easily broke open the plastic shell and inside was a very strange looking object. It looked like a cool blue rock that shimmered like water. It felt like slick rubber but it bended and changed shape like Jell-o. This is weird, Earl though. As he was running out the kitchen door to ask Katie about this, the â€Å"thing† slipped out of his hand and a bounced straight up a couple hundred feet. While it was still going up, it disappeared. Uh-oh, Earl thought, it’s going to do whatever it’s supposed to do! Then, it warped back into existence right in the palm of Earl’s hand! Weird, Earl thought, better not tell Katie right away. At night, he put the pod under his pillow. It just made him feel safer when it’s in his hands than in his parents bedroom. Next morning, he felt really tired. He glanced at the slip and was shocked at the numbers on it. It read that instead of 32 EUs needed, it only said 3. Uh-oh, I looked at the back of the slip and found more words on it.

Economic Value Added

EVA is a way of measuring a firm's profitability. EVA is NOPAT minus a charge for all capital invested in the business (Byrne 1). A more intuitive way to think of EVA is as the difference between a firms NOPAT and its total cost of capital (Kramer & Pushner 40). Stern Staurt's numerical definition of EVA is calculated for any year by multiplying a firm's economic book value of capital  © at the beginning of the year by the spread between its return on capital  ® and its cost of capital (K): EVA=(Rt-Kt)*Ct-1 (Kramer &Pushner 41). EVA is a notion of residual income (Ehrbar Xi). Investors demand a rate of return proportional to the amount of risk incurred. Operating profits determine residual income by plotting them against the required rate of return, a product of both debt and equity. EVA takes into account all capital invested. Peter Druker says in his Harvard Business Review article, â€Å"EVA is based on something we have known for a long time: What we call profits, the money left to service equity, is not profit at all. Until a business returns a profit that is greater than its cost of capital, it operates at a loss. Never mind that it pays taxes if it had a genuine profit. The enterprise still returns less to the economy than it devours in resources†¦. Until then it does not create wealth but destroys it† (Ehrbar 2). EVA is a measure of wealth creation or destruction after all costs are capitalized. Companies use EVA as a measure of corporate performance, as an incentive system and as a link between shareholder and management/employee goals. Stock price indicates investor's certainty concerning current and future earnings potential. EVA is a static measure of corporate performance; MVA is a dynamic, forward looking market performance measure. MVA is a market generated number calculated by subtracting the Capital invested in a firm  © from the sum (V) of the total market value of the firm's equity and book value of debt: MVA=Vt-Ct† (Kramer & Pushner 42). Al Ehrbar describes MVA as exactly equivalent to the stock market's estimate of the NPV of a company. In 1998 CSX Corperation introduced EVA criteria to the fast growing but low margin CSX Intermodal business, where trains deliver freight to waiting trucks or cargo ships. Large amounts of capital are required to power a mammoth fleet of locomotive, containers and railcars. Figuring in capital costs, CSX Intermodal lost $70 million in 1988. â€Å"The CEO issued an ultimatum, et EVA up or be sold† (Fortune, 39). CSX Intermodal freight volume increased by 25%, yet they dramatically reduced their capital cost by reducing the number of container and trailers by 22%, reducing their locomotive fleet by 33%, and reducing fuel costs. EVA in 1992 was $10 million dollars, and was expected to triple the following year. Wall Street responded: CSX stock price rose from $28 before EVA to a 1993 price of $75. CSX concluded that investors care more about their net cash return on capital than accounting figures such as EPS, ROE and ROA. Companies that adopt EVA as a performance measure found tie-in compensation plans very useful in aligning management behavior and shareholder needs. Typical plans consist of two familiar parts, a bonus and stock incentives, applied in new ways (Fortune 50). Bonus targets are established by a percent increase in EVA and recalculated each year by averaging the prior year's goal and the prior year's result. Bonus have no limits, but the manager incurs operating risk because some of the bonus is put in a â€Å"bank,† say, for five years. If over the next five years management performs poorly, and EVA drops, the â€Å"bank† account is depleted. Management incurs the risks and benefits just as owners do. Joel Stern notes that in cases without an EVA incentive plan, employees suffer from a common problem. On average their fixed pay, salaries and pension, are too high, and their variable pay, profit sharing and share options, are to low (Ehbar XIX). Stern adds that size, not value, drives employees in typical incentive programs because size is positively correlated with increases in fixed pay and closely thereafter, variable pay, even if it destroys shareholder wealth. EVA protects shareholder interests by depositing variable pay into a deferred account that can be lost if value is eroded. EVA, as a corporate measure and a predictive tool, generates mixed reviews in the business and academic worlds. AT&T's Jim Meen says, â€Å"The correlation between MVA and EVA is very high. So when your driving your business toward EVA, your really driving the correlation with market value† (Kramer & Pushner, 43). Stern Stewart finds an R squared value of 60% based on 20 groupings of firms (Kramer & Pushner, 41). Contenders site statistical evidence to the contrary. BCG-Holt calculates an R square, after removing 21 outliers, of 27%. Dodd and Chen report that EVA accounts for only 20. 2% of the variation in stock returns for a sample of 500 companies, while ROA explains 24. 5% of market returns (Kramer & Pushner, 43). In their paper â€Å"An Empirical Analysis of Economic Value Added as a Proxy for Market Value Added,† Kramer and Pushner test the hypothesis that EVA is highly correlated with MVA. Simple regression analysis is used to test this hypothesis and other market determinants of market value such as NOPAT. First Kramer and Pushner test the relationship between the level of MVA and the level of EVA using the SS1000. In all cases the level of MVA positively relates to both NOPAT and EVA in the same and prior periods. However, in all cases, NOPAT explains more of the total variation in MVA than EVA† (O'Byrne & Stewart 44). This suggests that the level of NOPAT is not only a better proxy but also a better predictor of corporate performance than the level of EVA. Results for weighted least squares, change in MVA and variations are described graphically in appendix 1. Kramer and Pushner conclude that there is no clear evidence that EVA is the best measure of corporate success in adding value to shareholder investments (Kramer and Pushner, 47). Stephen F. O'Byrne and Stern Stewart and Co. tested a similar hypothesis. Their objective is to show that EVA provides a theoretical and practical measure of operating performance. O'Byrne and Stewart substantiate the explanatory power of EVA relative to earnings because, unlike previous studies, they recognize two important characteristics: Multiples of positive EVA are significantly higher than multiples of negative EVA, which implies that companies with negative EVAs have values that are higher than what would be expected if the market valued EVA at the same multiple. Multiples of capital tend to decline with company size, which suggest that the market assigns higher multiples to a given level of EVA for smaller companies. Stewart, 117). O'Byrne and Stewart suggest at first glance that earnings and EVA have about the same level of success in explaining market value. The variance explained ranges around 32%. Taking into account the two characteristics listed above, the explanatory power of their model increases to 42%. Five-year changes in EVA explain 55% of the variation in market value, and ten-year changes in EVA explain 74% of the variation in ten-year changes. The NOPAT model has 15%-20% less explanatory power. The results of O'Byrne and Stewart research appear in appendix 2. They conclude that because EVA is systematically linked to market value, it proves to be a better predictor of market value than other performance measures. Proponents of EVA also argue that GAAP standards distort true economic reality, produce unreliable corporate standards and serve as an unproductive compensation system. Harvard business school professor Baruch Lev states that; â€Å"Overall, the fragile association between accounting data and capital market's values suggest that usefulness of financial reports is rather limited† (Ehrbar, 161). Some differences in GAAP and economic reality stem from a bias toward conservative estimates, compounded by SEC requirements driving conservative financial policies. The principal divergence is GAAP's treatment of equity. The cost of equity should be capitalized. The cost of borrowed capital shows up in a companies interest expense. â€Å"But the cost of equity capital, which the shareholders have contributed, typically appears nowhere in any financial statement-and equity is extraordinarily expensive† (Fortune, 38). Ehrbar contends that GAAP distorts economic reality in areas such as R&D, strategic management, expense recognition, depreciation, restructuring charges, taxes and balance sheet adjustments (64). R&D under GAAP standards require Corporations to immediately expense R&D in the period in which they occur, where as managers and investors see R&D as an investment. GAAP's treatment of R&D reduces book value by writing down the asset to $0; EVA would capitalize R&D and amortize it over a period of time. Lastly, GAAP incentives can be ineffective motivators. For example, a retiring officer's pension plan is linked to earnings. During their last year they might skimp on R&D to boost earnings because their pension plan is tied to performance. Operating earnings often serve as the benchmark for management compensation. Management has the incentive to negotiate a target that is easy to beat. Managers aim low, insuring their bonus. Trade loading is a second example of how GAAP can affect management decisions concerning bonuses and owner interests. EVA as a measure of financial performance is positively related MVA, but depending on the methodology, the result vary. Kramer and Pushner used simple univariate regressions to compare EVA with other measures explaining EVA. Their results were mixed, NOPAT's explanatory power in Ordinary Least Squares Regressions outperformed EVA by 9%, however when weighted, EVA's explanatory power was higher overall and surpassed NOPAT by 6%. Kramer and Pushner note that the market focuses on profits rather than EVA. Investors rely on earnings estimates that are consistently calculated within the industry. This is not the case for FCF or EVA. Lastly, Kramer and Pushner observe, â€Å"investors certainly need to be aware of capital structure, they should already by familiar with the opportunity cost of their investment and may not need to incorporate this into the measure of performance† (Kramer and Pushner 47). Investors may be familiar with the opportunity cost of their investments, although EVA analysis can illuminate problems, such as those created by GAAP accounting, that may not be recognized otherwise. Stephen O'Byrne and Stern Stewarts calculation required the recognition of two important characteristics that drastically changed the explanatory power of EVA. They note that simple a simple regression model, similar to the one used by Kramer and Pushner, depresses the predictive power of EVA and inflates the predictive power of earnings (Stewart 120). EVA with industry coefficients explains and impressive â€Å"56% of the variation in actual market/capital ratios† (Stewart 121). It also produces notable results for changes in EVA and market value over time. Far better results than NOPAT. My results using a simple linear regression model parallels Kramer and Pushner's results. EVA in 1997 has the highest R square factor, at 33%, but is far from the results calculated by Stewart. EVA's R squared increased dramatically since 1992. This is consistent with the economic trend of the 90's, so the increase may not necessarily reflect an increase in EVA due to internal factors, but an external factor, such as the greatest economic expansion in recorded history. All four factors consistently increase from 1992 to 1997. EVA could be a valuable tool if it is tailored to the company and industry. This requires an understanding and adjustment for different EVA multiples for positive and negative EVA and different capital multiples for different size companies. This requires complex calculations, a regularly cited problem. However, in this context EVA lives up to its reputation as a great measure of corporate performance. Other functions, such as aligning employee and shareholder goals, the basis for an incentive system and a more realistic picture of economic reality, makes EVA more attractive. I would recommend using Stern Stewart model to calculate EVA.

Summary or Baby Thesis - 623 Words

------------------------------------------------- Fourth Year AB-Philosophy An Analysis of Don Ihde’s Phenomenology of Technics in Relation to Man’s Dependence on Computers Summary In this thesis, the researcher would like to expound the meaning of our relation to technology as means-ends relationship. Don Ihde’s Phenomenology of Technics (1990) which builds on insight from Heidegger and Meleau-Ponty, provides further points of relevance in prefacing a discussion of the dynamics characterizing the navigation of the city. Phenomenology of Ihde has been modified and it has been corrected by the environmental model of pragmatism under the influence of John Dewy. According to Idhe, â€Å"pragmatism counterbalances Husserl’s†¦show more content†¦Technology as a system tends to involve the perception of the inextricable and relentless quality of technological change, and the sense of being caught up inside of it. In this thesis, the researcher would like to use this phenomenology of technics in order to show our different kind of relationships with technology. As one of the common standards of people today in determining which among the countries, cities, municipalities etc. is advance, productive and civilized (urbanized) is through the technology it has. And one of the main factors of this fast technological advancement is computer. Computer seems to be the example of this concept of Ihde, from embodiment, to hermeneutic, to alterity and up to background. Most of our everyday living seems to be empowered by the computer starting from the moment the people wake up, they check immediately their mobile computer as their alarm clock, also to connect with their family, job mates, friends, etc. Computer now is no longer the computer that we knew before, aside from its cheaper price , incredible designs and portability, the use of computer is no longer for business only but most especially for education and entertainment Due to its powerful influence whether in our culture, attitude, education etc., man implicitly making his needs and necessity numerous. In business, the productivity of the employees or of theShow MoreRelatedCultural and Ethnic Studies682 Words   |  3 Pageswants to be included in your research paper. Sample outlines for research papers will be given later on. But first, let us discuss the main parts of your paper and what information each should cover. INTRODUCTION The Introduction should contain your thesis statement or the topic of your research as well as the purpose of your study. You may include here the reason why you chose the particular topic or simply the significance of your research paper’s topic. You may also state what type of approach itRead MoreResearch Paper Outline Example980 Words   |  4 Pageswants to be included in your  research paper. Sample outlines for research papers will be given later on. But first, let us discuss the main parts of your paper and what information each should cover. Introduction The  Introduction  should contain your  thesis statement  or the topic of your research as well as the purpose of your study. You may include here the reason why you chose the particular topic or simply the significance of your research papers topic. You may also state what type of approach itRead MoreArtifical Insemination1060 Words   |  5 PagesSEQUENCE DESIGN | | | SPEECH TITLE | Topic: Artificial Insemination | Specific Purpose: To persuade people to use artificial insemination instead of adoption. | Thesis Statement: Artificial insemination is a topic not may people openly discus unless they have complications, but I want to tell you about somethings that might want to pick insemination, the sperm banks, as well as the donors one may have. | | Read MoreSmoking and Pregnancy Essay726 Words   |  3 PagesEffects of Smoking and Pregnancy William Franklin Stewart Marshall University January 19, 2010 Thesis Statement Smoking during pregnancy is associated with many adverse outcomes for children as well as negative consequences for child health and development. Maternal smoking late in pregnancy reduces birth weight and size. Babies that are born to habitual smokers weigh, on average, about 9 oz. less, and are shorter both at birth and in the years to come (Berger 115). Nicotine is the addictiveRead MoreShould Abortion Be Made Illegal? The United States?937 Words   |  4 PagesCon Side of Debate Summary: â€Å"Should abortion be made illegal in the United States?† Imagine, over 53 million people are killed in the worst case of genocide ever recorded in the history of mankind. What should be done to stop those terrible atrocities? Should someone be hold accountable? What about the senseless slaughter of innocent fetuses? Abortion has affected us all in one way or another since Roe vs. Wade, and it s legalization. The morality issue is one, which will have a hauntingRead MoreInformative Speech961 Words   |  4 PagesDepression Thesis: Postpartum depression is a mood disorder that can greatly effect new mothers. Knowing how to recognize their symptoms and treating it can greatly increase chances of a healthy, happy living. Attention Getter: Imagine a bright sunny morning, lite clouds low chances of rain which is a great example of a perfect day. You receive a call from someone who is about to have a baby. Who can believe an already perfect day can get any better. The mother is in labor and the baby is due anyRead MorePersuasive Speech : Breastfeeding Infants Essay861 Words   |  4 PagesBreastfeeding saves babies’ lives! Establish Credibility: My son is now 10 months old, and has been exclusively breastfed since birth. He has never experienced any health issues beyond a common cold. He has never had an ear infection, never experienced diarrhea, asthma, allergies, colic or obesity. It is my strong belief, and statistics back me up, that this is in fact because he is breastfed. I believe I am credible to motivate you to breastfeed your infant or encourage your loved ones to. Thesis: AlthoughRead MoreInformative Speech : Reference Of Music By Gretel Herrera1124 Words   |  5 Pagesby Gretel Herrera General Purpose: To Inform Specific Purpose: At the end of my speech, the audience we will learn the importance of music in our lives and the benefits associated with listen to music to our health and development of our brain. Thesis: Music is an important and rewarding part of our lives and is essential to the development of a child’s brain and to keep a healthy body. I. Introduction A. Attention Getter: Today I am going to talk about music. We can say that all people aroundRead MoreSmoking Is Bad For Your Health749 Words   |  3 PagesSmoking is bad for your health Thesis Statement: Not only is smoking cigarettes bad for the person both short and long term but those around are affected by the secondhand smoke. Summary: With over 300 million smokers around the globe it begs the question how is their choice to smoke cigarettes affecting not only themselves in the short run but also overall. Short term effects include frequent cough, colds, bronchitis, as well as pneumonia. The long-term effects are much grimmer than the short termRead MoreThe Behavioral Theory Of Classical Conditioning And The Cognitive Theory1194 Words   |  5 Pagesbeen well investigated to produce an outcome of effective learning. This study will examine the conditions of learning from both theories and ague their differences as well as their similarities. Evidence will be present on both sides to support this thesis claims on conditions, similarities and differences. This study will focus on the two theories assumptions, measurements of learning, and its implications to the field. Classical Conditioning and Social Cognitive Classical Conditioning