Theoretical methodologies Essay Example for Free

Theoretical methodologies Essay Research Design Population The population to test the hypothesis is a group of 102 students’ data collected from various universities across the United States. The sampling included a systematic random sampling method to ensure that students from all kinds of universities and economic and academic backgrounds – the focus was to ensure that the sample was free from biases and reflected as closely as possible the true student population of the United States university students. The age range for the collected sample ranged from 18 to 24. As many as 10 different universities were represented in the sample of 102 students and the economic status of the students was kept anonymous assuming that it was normally distributed. The next step was to gather the number of hours they spent studying. This was done by providing to them an hourly description document of their activities attached in the appendix. From that the number of hours studied was keyed off and stored for corresponding GPA entry. The GPAs were obtained from the career counselors of the universities – to ensure the accuracy and the authenticity of the data. The methodology used by Stinebrickner and Stinebrickner (2007) is complex; it involves establishing the exogeneity of the factors that might affect the causal relationship of studying to academic average and was unique to the study since the research setting had a more controlled and rigid atmosphere than most colleges that made the experiment possible. Prior to the study, the researchers had gathered longitudinal data about student’s academic and personal life in the campus and used the said data to build a model of the typical college student’s habits and behavior. Methodology Used Since the relationship between increase in hours of study and GPA increase is proportional (could be either linear or exponential), we will use regression testing to establish the conclusion as to whether the relationship is significantly strong enough (causative) or not. Research Question: â€Å"Is there a positive relationship between the number of hours spent by a student studying and the GPA obtained by the student? † Data Analysis The ordered pairs for the correlation coefficient will be as follows: [Hours spent on Studying, GPA]. The dataset is as follows: Hours Spent GPA Hours Spent GPA Hours Spent GPA 0 3. 00 2 1. 71 2 3. 83 1 1. 67 2 2. 59 0 2. 01 1 1. 30 3 3. 36 1 1. 09 6 1. 34 1 1. 28 5 2. 59 2 1. 25 0 3. 17 0 2. 74 5 3. 85 4 1. 11 1 1. 47 2 2. 36 3 3. 95 1 1. 08 3 2. 93 0 3. 44 5 2. 26 3 1. 74 0 2. 88 4 3. 04 3 3. 55 1 2. 87 4 1. 95 1 1. 22 3 2. 26 0 3. 42 2 3.49 3 3. 09 1 3. 19 3 3. 76 0 1. 03 3 2. 27 5 2. 56 5 3. 76 2 3. 71 6 2. 50 1 1. 87 4 2. 40 6 2. 59 6 3. 68 1 1. 26 2 1. 29 0 1. 00 4 3. 27 2 3. 42 2 2. 45 2 1. 74 5 2. 37 0 2. 66 1 2. 25 4 1. 31 5 1. 13 2 2. 56 3 3. 00 5 3. 05 5 2. 67 0 3. 22 2 2. 73 0 1. 72 5 3. 34 4 3. 71 5 2. 80 4 3. 65 5 1. 52 2 1. 25.5 2. 14 4 1. 98 1 3. 30 0 3. 75 2 3. 09 6 2. 17 0 2. 75 3 2. 62 6 2. 69 0 2. 29 1 3. 42 6 2. 06 5 2. 70 4 1. 51 6 1. 93 0 2. 85 1 3. 36 6 2. 18 0 1. 87 0 2. 90 1 3. 79 4 3. 61 4 3. 13 3 3. 13 0 2. 38 1 3. 14 2 2. 37 5 3. 38 3 2. 38 0 1. 01. This is based on the assumption that the number of hours spent on studying is the determinant of the GPA obtained by a student. This leads to the proposition that age is the independent variable and money spent on an automobile is the dependent variable. A total of 80 ordered pairs of age and money spent on an automobile are available in the dataset. The following is the scatter plot obtained for the data: Even a rough glance at the scatter plot will tell a non-statistician that there is a no linear relationship or causative association between the two variables. However, for the purpose of our study, we will complete the steps necessary to form a conclusion. Using the CORREL function in Excel, the value for the correlation co-efficient was: Analysis of the dataset using linear regression model led to following regression equation: Based on the values of the gradient and slope in the equation above and the correlation coefficient, one can easily conclude that the dataset seems to reflect upon the fact that there is a vague causative relationship between the number of hours spent studying by a student and their GPA. However, it is important to test this hypothesis and make a conclusion on the basis of statistical techniques. Hypothesis Testing On the basis of the above obtained difference in the calculated and tabulated statistics, we can conclude that there is a positive relationship between the number of hours spent studying by a student and their GPA. Though weak it can be predicted by the following equation: Findings It was found from statistical testing that the calculated statistics (from the dataset) lay outside the region of acceptance. This forced us to reject the hypothesis that there is absolutely no relationship between the two variables. Though weak (in terms of the gradients), the relationship exists, is incremental (positive) and suggests that the student not putting any hours of study will end up having a GPA of 2. 448 (put x=0). The graphical conclusions cannot be accepted as they, when accompanied by the trend line, seem themselves not enough to undermine a conclusion. The t-statistic testing was the best method to test the data and the conclusion is subtle, assuming that the data collected was free from errors and biases. Conclusion. The statistical regression testing applied on the dataset suggests that there is a weak positive causative relationship associated with the students’ study hours and GPA. It forces the conclusion drawn from this study to be: the higher the number of hours spent by students studying, the higher will their GPA be. Even though the incremental GPA due to an additional hour of study is not significantly high, we cannot conclude that there is no relationship between the two (although the graph seems to suggest this on visual perception). Taking the theory into account that slow and steady wins the race, we can assume the fact that students who spent in time studying generally have better GPAs than other students who either rely on their intelligence to get them across or other weaker students who are careless about studying. The scope of this research was limited and the results therefore are limited for interpretation. A better research carried out across more schools and more students definitely would promise better results in future undertaken by any other researcher. But for the moment, we can conclude that there is a positive causative relationship between the number of hours studied and GPA for university students in the US. Works Cited Anand, V. (2007). A study of time management: The correlation between video game usage and academic performance markers . CyberPsychology Behavior, 10(4): 552-559. Babbie, E. (2004). The Practice of Social Research, 10th ed. Boston: Wadsworth, Thomson Learning Inc. Hill, L. (1991). Effort and Reward in College: A Replication of Some Puzzling Findings. † In James W. Neuliep (ed), Replication Research in the Social Science. Newbury Park, CA: Sage, pp. 139-56. Rau, W. Durand, A. (2000). The academic ethic and college grades: Does hard work help students to ‘make the grade’? Sociology of Education, 73:19-38. Rivkin, S. , Hanushek, E. Kain, J. (2005). Teachers, school, and academic achievement. Econometrica, 73(2), 417-458. Schuman, H. , Walsh, E. , Olson, C. Etheridge, B. (1985). Effort and reward: The assumption that college grades are affected by the quantity of study. Social Forces, 63:945-66. Stinebrickner, T. Stinebrickner, R. (2004). Time-use and college outcomes. Journal of Econometrics, 121(1-2), 243-269. Stinebrickner, T. Stinebrickner, R. (2007). The causal effect of studying on academic performance. National Bureau of Economic Research Working Paper, No. 13341. Walpole, R. E. (2002). Introductory Statistics. Los Angeles: Kraft Publishers. Weiss, N. A. (1984). Introductory Statistics, 5th Edition. New York: CRC Press. Appendix Time Period What were you doing? 6:00 AM 7:00 AM 8:00 AM 9:00 AM 10:00 AM 11:00 AM 12:00 Noon 1:00 PM 2:00 PM 3:00 PM 4:00 PM 5:00 PM 6:00 PM 7:00 PM 8:00 PM 9:00 PM 10:00 PM 11:00 PM 12:00 MN 1:00 AM 2:00 AM 3:00 AM 4:00 AM 5:00 AM.

A Post War Problem :: War Essays

A Post War Problem War, as we all know, is a devastating part of human existence. For as long as humans have gathered, there have been conflicts that arose between the different groups or gatherings. These assembled groups, in turn, would wage war against one another for a countless number of reasons. Differences in beliefs, land, money, and power are among the most common reasons warfare occurs. Nowadays, wars are still waged for the same reasons yet now entail a more catastrophic level of fighting with technology being what it is. The little knowledge I have about war is mainly from movies, like Full Metal Jacket and Saving Private Ryan to name a few, or from historical accounts. Therefore, to me war is the horrible slaughter of innocent individuals. In the Vietnam War, well the Vietnam conflict to be more accurate, young men were being sent overseas to fight. It was not under their personal desire to do go to war that these young men were involved in the fighting, but because the government had draf ted, or selected, them to do so. It was this fact that instilled fear in all young men, their family's and others. To know at any moment you will no longer have a free will to do as you desire and instead will be submersed into hysteria and death. My father spoke with me about his draft experience and said he choose to sign up rather than be drafted, because he knew draftees were almost always trained for infantry and therefore stood the greatest likelihood for being killed. Thus, my father became a cook and baker for the Army. The draft is the random selection of men eighteen to twenty-five to serve in the military during a time of conflict. The draftees are then on active duty for two years until they are released back into civilian life. The law in the United States (US) asserts that a draftee's job must be held for him until his return from active duty. With regard to Vietnam, the American public was unsure of what our government's objectives were, and therefore certain individuals became skeptical. Yet, the draft continued for it was necessary to feed the need for more soldiers. Sadly, many of these draftees did not have the opportunity to return home and retrieve their job that was held for them because they were not lucky enough to survive. A Post War Problem :: War Essays A Post War Problem War, as we all know, is a devastating part of human existence. For as long as humans have gathered, there have been conflicts that arose between the different groups or gatherings. These assembled groups, in turn, would wage war against one another for a countless number of reasons. Differences in beliefs, land, money, and power are among the most common reasons warfare occurs. Nowadays, wars are still waged for the same reasons yet now entail a more catastrophic level of fighting with technology being what it is. The little knowledge I have about war is mainly from movies, like Full Metal Jacket and Saving Private Ryan to name a few, or from historical accounts. Therefore, to me war is the horrible slaughter of innocent individuals. In the Vietnam War, well the Vietnam conflict to be more accurate, young men were being sent overseas to fight. It was not under their personal desire to do go to war that these young men were involved in the fighting, but because the government had draf ted, or selected, them to do so. It was this fact that instilled fear in all young men, their family's and others. To know at any moment you will no longer have a free will to do as you desire and instead will be submersed into hysteria and death. My father spoke with me about his draft experience and said he choose to sign up rather than be drafted, because he knew draftees were almost always trained for infantry and therefore stood the greatest likelihood for being killed. Thus, my father became a cook and baker for the Army. The draft is the random selection of men eighteen to twenty-five to serve in the military during a time of conflict. The draftees are then on active duty for two years until they are released back into civilian life. The law in the United States (US) asserts that a draftee's job must be held for him until his return from active duty. With regard to Vietnam, the American public was unsure of what our government's objectives were, and therefore certain individuals became skeptical. Yet, the draft continued for it was necessary to feed the need for more soldiers. Sadly, many of these draftees did not have the opportunity to return home and retrieve their job that was held for them because they were not lucky enough to survive.

Patriot Act, Pros and Cons

The Patriot Act was signed into law by President Bush in response to the tragedy of the events of 9/11. This report explains the issues that warranted this law, as well as the advantages and disadvantages of the Patriot Act of 2001. Passed in the weeks after the Sept. 11 attacks, the law expanded the government's powers in anti-terrorism investigations. And as expected, controversy is always an issue when such laws are passed. The Patriot Act in no exception. Although the law was designed to counter terrorism within the borders of the United States, some provisions of this law are controversial due to infringements on civil liberties. The following are a list of pros and cons based on information provided by the United States Department of Justice, and ACLU. The Pros: †¢Allows law enforcement to use surveillance against more crimes of terror †¢Law enforcement can conduct investigations without tipping off terrorists †¢Federal agents ask a court for an order to obtain business records in national security terrorism cases †¢The Patriot Act facilitates information sharing and cooperation among government agencies so that they can better â€Å"connect the dots. †¢The Patriot Act reflects new technologies and new threats †¢Law enforcement officials may obtain a search warrant anywhere a terrorist-related activity occurs The Cons: †¢FBI can demand â€Å"any tangible thing,† including books, letters, diaries, library records, medical and psychiatric records, financial information, membership lists of religious institutions, and genetic information without your knowledge or conse nt a. The FBI needs only to tell a judge (no need for evidence or probable cause) that the search protects against terrorism. The judge has no authority to reject this application. †¢Section 213: a. It expands the government's ability to search private property without notice to the owner †¢Violates the 1st and 4th Amendments to the Constitution †¢Does not work: a. 0 out of 5,000 suspects detained for terrorism have been convicted Opponents of the Patriot Act argue that this law was pushed through Congress with some measure of haste and opportunistic tones. The debate and controversy will obviously continue as is with most laws passed within the halls of the United States Congress. As guaranteed by the Constitution of the United States with respect to the right of protest, the Patriot Act will continue and amendments will sure to follow. The act’s own framers admit that it reduces peacetime liberties but argue that it is must continue in order to fight terrorists. As is the case with a law such as the Patriot Act, once it is implemented the government is always reluctant to relinquish its additional powers regardless of whether or not the original threat that prompted the act still exists. Such laws are sometimes viewed as too harsh or simply appalling and sometimes a person feels that his or her privacy is being violated. Sometimes all one has to do is to remember the tragic events of 9/11 to renew their sense of well being, security, and the freedom that is afforded by this great nation, the United States of America.

Advertisement and Vice Product - 2568 Words

Jeffrey Chau Zi Hao English 1A Ms Valarie Fong â€Å"Vice† Product and Advertisement When is the last time you go to order a burger in fast food shop? And recently have you ever went to a convenient store and purchased a pack of cigarette? Nowadays advertisement of fast food, tobacco and alcohol product are catchy in magazines, newspapers, TV commercials or bus stop stations and it seems these products have become part of our daily lives. Fast food, tobacco and alcohol products are advertised as our â€Å"trusted friends† and fast food, tobacco and alcohol companies are targeting not only adults but also teenagers and children to be their potential customers. What are the possible adverse effects brought by these â€Å"vice† or unhealthy products to†¦show more content†¦What would young people think about this advertisement? To most of the teenagers there are plenty of things that they are restricted to know about when they are very young. Many young people are very eager or curious to explore new st uff like sex or even smoking and drinking. Tobacco and alcohol companies are now even focusing 18-to-25 year old markets by promoting events at bars and sponsoring rock and blues concerts. Every year alcohol companies spend $5.7billions on commercials concentrated in sports programs to make their products part of the fun in the matches. Such advertisement strategies by fast food, tobacco and alcohol companies may seem not a big deal to us, however it would be not wise for us to ignore the potential impacts by such products as they are already influencing our life little by little. Too much fast food not only has brought harm to young people’s health but also distorted their universal values by misleading them that everything are granted when their parents promise to buy them fast food after they constantly nag or beg their parents. For cigarette and alcohols, even though these products are for adults only, we should not underestimate the potential harm to teenagers. More and more teenagers may become pro-longed smokers and drinkers and eventually some of them may end up giving up their future by abandoning their study or jobs. In worst case scenario there may result in family dispute and violence. It would be very sad thatShow MoreRelatedUrban Decay : A New Standard Of Beauty1517 Words   |  7 PagesAnother Vice Urban Decay, not only a makeup line but a new standard of beauty. Well known for their show stopping makeup and worldwide fame, Urban Decay is known for setting themselves to be above and beyond competitors. The literal definition of beauty is; â€Å"the quality of being physically attractive. 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