What Is a Controlled Experiment

A controlled experiment is one in which everything is held constant except for one variable. Usually, a set of data is taken to be a control group, which is commonly the normal or usual state, and one or more other groups are examined where all conditions are identical to the control group and to each other except for one variable. Sometimes its necessary to change more than one variable, but all of the other experimental conditions will be controlled so that only the variables being examined change. And what is measured is the variables amount or the way in which they change. Controlled Experiment A controlled experiment is simply an experiment in which all factors are held constant except for one: the independent variable.A common type of controlled experiment compares a control group against an experimental group. All variables are identical between the two groups except for the factor being tested.The advantage of a controlled experiment is that it is easier to eliminate uncertainty about the significance of the results. Example of a Controlled Experiment Lets say you want to know if the type of soil affects how long it takes a seed to germinate, and you decide to set up a controlled experiment to answer the question. You might take five identical pots, fill each with a different type of soil, plant identical bean seeds in each pot, place the pots in a sunny window, water them equally, and measure how long it takes for the seeds in each pot to sprout. This is a controlled experiment because your goal is to keep every variable constant except the type of soil you use. You control these features. Why Controlled Experiments Are Important The big advantage of a controlled experiment is that you can eliminate much of the uncertainty about your results. If you couldnt control each variable, you might end up with a confusing outcome. For example, if you planted different types of seeds in each of the pots, trying to determine if soil type affected germination, you might find some types of seeds germinate faster than others. You wouldnt be able to say, with any degree of certainty, that the rate of germination was due to the type of soil. It might as well have been due to the type of seeds. Or, if you had placed some pots in a sunny window and some in the shade or watered some pots more than others, you could get mixed results. The value of a controlled experiment is that it yields a high degree of confidence in the outcome. You know which variable caused or did not cause a change. Are All Experiments Controlled? No, they are not. Its still possible to obtain useful data from uncontrolled experiments, but its harder to draw conclusions based on the data. An example of an area where controlled experiments are difficult is human testing. Say you want to know if a new diet pill helps with weight loss. You can collect a sample of people, give each of them the pill, and measure their weight. You can try to control as many variables as possible, such as how much exercise they get or how many calories they eat. However, you will have several uncontrolled variables, which may include age, gender, genetic predisposition toward a high or low metabolism, how overweight they were before starting the test, whether they inadvertently eat something that interacts with the drug, etc. Scientists try to record as much data as possible when conducting uncontrolled experiments, so they can see additional factors that may be affecting their results. Although it is harder to draw conclusions from uncontrolled experiments, new patterns often emerge that would not have been observable in a controlled experiment. For example, you may notice the diet drug seems to work for female subjects, but not for male subjects, and this may lead to further experimentation and a possible breakthrough. If you had only been able to perform a controlled experiment, perhaps on male clones alone, you would have missed this connection. Sources Box, George E. P., et al.  Statistics for Experimenters: Design, Innovation, and Discovery. Wiley-Interscience, a John Wiley Soncs, Inc., Publication, 2005.  Creswell, John W.  Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. Pearson/Merrill Prentice Hall, 2008.Pronzato, L. Optimal experimental design and some related control problems. Automatica. 2008.Robbins, H. Some Aspects of the Sequential Design of Experiments. Bulletin of the American Mathematical Society. 1952.

The Issue Of Gun Control - 1384 Words

Coming from where I was raised my whole life, as an young African American my two eyes have witnessed many altercations involving a gun. In this country we have homeless people that’s struggling in poverty. They can t find work, increasing inflation rates, an unstable budget, and more importantly, a problem with guns. Like everyone else living in rough environments, I am cautious about being the victim of a random shooting, but at the same time, I want to be able to protect my family at all costs no matter the situation. Guns affect each and every one of us on a day-to-day base. A gun put fear in ones heart or they make us feel safe and protected at all times. The point that I must try my best to get across is this: guns are a huge problem within our society, but using gun control to diminish them isn t necessarily the best resolution. When I say gun control I am speaking upon the laws that prevent firearms from being on the street by preventing their purchase. I agree that so me form of gun control is well needed by far; but what we really need to focus on is gun licensing and more gun safety. I believe in my constitutional right to keep in bear arms, and I don t feel that legislators should be allowed to take away that right. Gun control can be a good thing, but if it leads to gun prohibition I will take on the whole world to prove a point. Our country was founded on the basis of guns. Throughout history wars was won with guns and guns protected our people.Show MoreRelatedGun Issue And Gun Control1401 Words   |  6 PagesUniversity, Gun Politics has been a course I have aspired to take. While many enroll in such a course looking for an escape from the â€Å"collegiate liberal echo chamber† or as an outlet for their conservative agendas, I saw the class as an â€Å"entrance to the dark side.† My views on guns prior to the class were, I would call, polarized yet uninformed. In most of my discussions, I would cite the Australian 1996 National Firearms Agreement as precedent for how American politicians should approach the gun issueRead MoreThe Issue Of Gun Control Essay1646 Words   |  7 Pagessomebody who wants to inflict harm on other people to get his or her hands on a gun.† (Simple Minded Gun Control). Gun control is a controversial issue worldwide. The reason why this has attracted so much atte ntion is because not everyone is in favor of gun control and each side brings up excellent points about the issue. Research related to this issue strongly supports the claim that there SHOULD be more gun control laws. Three arguments that prove this position are (1) Incidents like Sandy HookRead MoreThe Issue Of Gun Control1489 Words   |  6 Pagessplit on the issue of gun control. We have seen many violent shootings and innocent people dying because of gun violence. Some Americans believe we need strict gun laws to protect our children and ourselves from these horrific tragedies. Other Americans believes it is our rights as Americans to posses’ guns and we are entitled to that right in our constitution. There are also some Americans that are stuck in the middle and can see both sides but recent events have definitely caused this issue to be inRead MoreThe Issue Of Gun Control1031 Words   |  5 Pagesintegrate them in a way that will trigger a new viewpoint on the subject . Gun control is something that should be enforced across the world in order to save lives. In the United States there is a ratio of 88.8 guns per one hundred persons (GunPolicy.org). Those numbers award us with the highest total per capita number in the world. With that amount of firepower there needs to be an efficient way to regulate who exactly can purchase a gun. Since 1791 when the second amendment was ratified there have beenRead MoreThe Issue Of Gun Control1705 Words   |  7 Pagesaway without preface or reason. All someone needs to do is pull the trigger. In today’s world, guns are far too accessible to the people of society. We hear in the news, stories of mass shootings, homicides, and suicides; most of which are caused by the activation of a gun. A hot-button issue, gun control is one of the most debated topics in American politics. Should we, or should we not, be able to own guns? Although it infringes on the Second Amendment that provides the right to bear arm s, this amendmentRead MoreThe Issue Of Gun Control951 Words   |  4 PagesGun control has been a big topic for the past decade in the united states. These debates will rise and fall time in and time out after something horrific happens in the state. Anti-Gun supporters do not realize that it is extremely difficult to regulate something in the states that is a big portion of our economy.Would stricter gun laws change anything? So far statistically It has been proven otherwise one must consider how a citizen would defend themselves when they are faced with terror. How willRead MoreThe Issue Of Gun Control929 Words   |  4 PagesGun Control Getting arrested yesterday was not the highlight of my week. I was hungry; so I went to Wal-Mart get some charcoal, lighter fluid, and steak. I put the charcoal in the grill and the lighter fluid on the coals. I got a little lighter fluid on my arm, but I didn’t pay it much attention. I lit the match and threw it on the coals. I looked down and my sleeve was on fire. I was waving my arm in the air, trying to put it out. Then here they come the police pulled in and tackled me to theRead MoreThe Issue Of Gun Control1552 Words   |  7 PagesThe issue of gun is always controversial. Firearm can be used as defending or an assaulting weapon. In United States, firearm increase the rate of homicide, suicide and gun violence, which can harm and murder people. Moreover, taking away people’s gun will not work effectively because the murder and criminal will find another ways to get guns. Also, the black market will appear for the people who cannot get guns from regulated market s. In addition, if regulated guns are banned, murderers may useRead MoreThe Issue Of Gun Control1678 Words   |  7 PagesJanuary 2014 The 2nd Amendment Over the past few years, the issue of gun control has been widely discussed. You surely have heard the phrase, â€Å"Guns don’t kill people, people kill people† uttered and i wholeheartedly support this statement. It is important to treat guns responsibly so they do not end up in the wrong hands. I believe gun control violates our inalienable rights. Another piece of our liberty will surely be taken away if guns are banned, and socialism and totalitarianism will be rightRead MoreThe Issue Of Gun Control1208 Words   |  5 PagesWill Christopherson Traverson English 2 1 March 2017 Gun Control The United States has 88.8 guns per 100 people, or about 270,000,000 guns, which is the highest total and per capita number across the globe. The current public gun control debate in the United States seems to be placed on standby until it is sparked up by a major mass shooting. There were at least 126 mass shootings between January 2000 and July 2014.(pro). Opponents of more gun laws accuse supporters of using a horrific event to further

Personhood Chart - Click Here to Get Instant Solution

Question: Draw Personhood Chart. Answer: Christianity Materialism Personal View Relational United States is having majority of Christianity followers. It helps people to know about gods plans and purpose regarding their life. Materialism followers are people who think god is not controlling their life Bourassa Laing (2014). Rules and regulation re very important for living a proper life. Multidimensional Christianity followers should be aware of all cultural aspects Wilkinson (2009). They should also know about the spirit, tradition of their religion. Materialism followers spend their life as per their own beliefs, thoughts, views and others. Cultural and religion aspects play important role in individuals life. Sexual Regarding sexual life Christianity is having different rules and regulation, which is to be followed by every Christianity follower. Materialism followers do not follow any predefined rules by any religion. They perform sexual activities as per their own beliefs, views. Every religion defines rules and regulation for sexual activities, which should be followed by everyone. Moral Christianity moral explains their ethics, theories, philosophies and beliefs. Every Christianity follower has to live their life as per these only. Materialism moral are different for every individual. Every materialism follower has their own beliefs and thoughts for life. Ethics and code of conduct are very important for living happy and prosperous life. Mortal Mortal in Christianity explains their mortal sins. It helps people to know what wrong acts according to Christianity are. It explains people list of wrong and correct acts. Every individual should avoid wrong acts in their life. Destined for Eternal Life Eternal life is life after death. Christianity explains if people performs wrong act they will be sent to hell. If they perform good acts in their life, they will go to heaven and meet god. They believe after death eternal life depends on peoples own activities. After death life depends on individuals act and decided by God References Bourassa, L., Laing, R. (2014) Materialism. [Iowa City]: PhotoStatic. Wilkinson, P. (2009). Christianity. New York: DK Pub.

Persuassive Speech Example free essay sample

Think to yourself while I purpose a scenario, you come home from work one day to find your wife, children, and even the dog dead. Caution tape surrounding your house, police officers everywhere, corner vans, but no one telling you what the heck is going on. The man who had shot your family is sitting hand cuffed in the back of a police car, would you want justice to be served? II. All but 17 of the 50 states practice the death penalty as of today. According to Wise Geeks, the death penalty is â€Å"the act of putting a person to death, after judgment by a legal system, either as an act of retribution, or to ensure they cannot commit future crimes. † (Web). There are many pros and cons that face the death penalty in the eyes of human’s. I would like persuade you why we should use the death penalty as a form of punishment. We will write a custom essay sample on Persuassive Speech Example or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Please listen with an open mind as I provide information about the death penalty to you. First I would like to inform you of the cost of the death penalty vs. how much it cost to houses an inmate. Secondly, that it in fact is not inhumane. Lastly, the series of events leading to the execution of the inmate. I choose to speak about the death penalty because I am a strong believer in it. My research included interviews, online sources, and documentaries about the death penalty. Transition: Let me get started by talking about the cost of both the death penalty and housing inmates. Body I. As housing can be very expensive, I spoke with a retired police officer from L. A. P. D is actually my grandfather, he explained to me that housing an inmate on death row in today’s economy cost roughly $60,000 a year equating to a little over $1 billion during their sentence. The inmate must be provided shelter, food, health care, and security. My grandpa also explained to me that many inmates sit on death row for long periods of time they actually die before execution occurs. Many inmates will kill themselves, be killed by other inmate, or have medical problems that cause them to die naturally. However, according to methods of execution it only cost $86. 08 to administer the lethal injection. The justice system could save on average $59,914 per inmate per year by administering the injection. Transition: This leads me to my second point, is the lethal injection inhumane? II. Many of us see that two wrongs don’t make a right, but take you back to scenario I proposed in the beginning of my speech. After my interview with Anonymous, he believes the death penalty is not inhumane because they do not feel the injection and even if they were able to feel it, the person they killed could feel the dismantling pain of dying too. I also interviewed my uncle from LA County. He too believes it is humane to administer the lethal injection. He stated that it is a two drug mixture; the first is a sedative and secondly a massive amount of potassium which will put a person in full cardiac arrest. He mentioned to me that if in fact California administered the lethal injection more often we would not only save money, but more people would be scared to commit a crime because they would see there would actually be a consequence. He believes a lot of people commit these crimes because they get away with it, they get an isolated cell with privacy and the inmate knows it’s highly unlikely that they will ever face the lethal injection. However, I spoke with Layla Guest who is against the death penalty because she believes they have a loving family too. She said to me â€Å"they may have had a bad experience but that doesn’t make them a bad person forever. † Transition: That brings me to my last point; I would like to inform you of the series of events in which the inmate is executed. III. I believe this is important to share with you because it backs up my point about being humane. Even though this inmate has committed a serious crime, they too get to have a good last day. According to a documentary I watched, filmed and edited by Scott Langley on the day of the execution the inmate is allowed in and out of the cell, and the right to watch TV. The inmate is allowed visitors for a certain amount of hours, and also allowed last request phone calls from family. The execution team will then come and pick the inmate up around 1:00 am where he/she is asked to remove all their clothes expect exposing portion and then taken into the prep room. In the prep room the inmate is placed on IV’s and heart monitors. The executor comes in and records any last statement. After he leaves the Chaplin comes into the room where they stay until it is time to be taken into the â€Å"chamber. † The chamber is a room with viewing windows for the witnesses. The inmate and the witness never see the executors because they stay behind the curtain. There are three executors during the process. Also, the viewing team never knows which personal came in with the drugs nor who will administer it for privacy purposes. Around 2:00 am the inmate is given a sedative to completely knock them unconscious followed by the lethal drug. Between 2:15-2:20 am the inmate is pronounced dead and taken by a confidential van to the hospital to be issued a death certificated as a homicide. Conclusion Transition: Again, I will ask you to listen with an open mind as I conclude my speech is persuading you to believe in the death penalty as a form of punishment. I. Here are a few things to remember when you think about the death penalty. The cost of housing an inmate versus the cost of execution.