Determining sample size Essay Example for Free

Determining sample size Essay Another five days of data was collected to add to the first 10 days of data having a total of 15 days of observation. The following are the text thread data obtained for a total of 15 days. A larger sample is now present for the analysis of the text thread that I have for 15 days. A large sample is really important in statistics. As the sample become larger, the data will approach the data of the whole population. The data will become as close to the real data (Israel, 2009). For example, the mean number of hours at work for the population of workers in United States is 8 hours. The sample mean of 50 workers 7. 5 hours. As the sample size increases, it is possible that the sample mean will become closer to the mean of the population. In this case, why should one use samples instead of the population? Or, why use large samples instead? Certain reasons are given to support the use of samples instead of very large samples or the population itself. One of the common reasons is population are sometimes infinite. When one speaks of infinite population, it means that one cannot actually count the total number of the members of the population. Another reason is time constraints; one cannot collect data for a very large sample or the whole population because there are certain time limitations. After having 15 samples, the mean for the 15 text threads were computed. The mean obtained from the 15 sample is 8. 2 threads per day. The mean for the 15 sample is less than the mean obtained for the data when there are only 10 observations included in the sample. The current sample of 15 observations is still insufficient in order to conclude something from the population. One still cannot determine whether the sample is already sufficient. Sufficient sample size can be determined through formula and different assessments such as the precision, confidence and variability a person wants on his sample. Nevertheless, as long as it is not the population itself, any kind of samples will still have an uncertainty associated in it; the uncertainty associated with the sample is called the sampling error. The smaller the sampling error, the better the sample size one has obtained (US Census Bureau, n. d. ). Reference Israel, G. (2009). Determining sample size. Retrieved August 20, 2010 from http://edis. ifas. ufl. edu/pd006. US Census Bureau. (n. d. ). Things that may affect estimates from the American community survey. Retrieved August 20, 2010 from www. census. gov/acs/www/Downloads/ACS_Affect_Est. ppt.

Directing the Actor Playing Macbeth in Act 2 :: Drama

Imagine you are a director. Direct the actor playing Macbeth in Act 2 Scene 2. Shakespeare's Macbeth has been a play out of the ordinary. It was written to upset, and show life at its most cynical and brutal. It is among his darker pieces of work along with Othello, King Lear and Hamlet. It was also written to please the current King of England at the time, King James I. The play is based on real Scottish history, as King Duncan was killed by one of his kinsmen who then became King. It is set within a Scotland in which frequent wars occur. Returning one of theses wars are Macbeth and Banquo - generals of the Scottish army. Lady Macbeth has made a soliloquy, in which she has asked demons to take away her sexuality and have it replaced with evilness. She asked literally to have her 'breast milk replaced with bile'. Having her milk replaced with bile would supposedly give her the ability to do masculine actions. She desires power and starts to mildly bully her lover, Macbeth, and ridicule his masculinity. She talks about a smiling baby and then one with it's brains smashed out she'd prefer this to having a husband unwilling to kill in cold blood. Lady Macbeth challenges Macbeth to prove his masculinity, by aiding her in killing King Duncan, who will soon be a guest at their house. The conspiracy is that they kill the King and smear the blood on his guards, which would make them the prime suspects. Macbeth is next in rank and is likely to become the next King of Scotland. Between them, there is an enormous desire to gain power and become leaders of the country. With this desire and Lady Macbeth's challenge combined, you have the play of Macbeth. Shakespeare has cleverly set the play in certain themes, such as ambition, good vs. evil, disorder and the supernatural. In this scene, Lady Macbeth will rendezvous with Macbeth in the courtyard as he returns from his challenge - the murder. Act 2 Scene 2 is an early climax of the Macbeth play. Anticipation has built whilst the conspiracy has been planned and the audience would be very eager to see what happens, as they have been posing questions in their head which need answering, such as 'Will they get caught?' or 'Will Macbeth become the King of Scotland?' A murder always attracts interest, and a murder of high treason would multiply such interest and excitement. It is highly significant as the infamous murder is committed here (not chronologically - it is not shown in the play).

Human brain Essay

Blood is the elixir of life. Without blood, the human body would not be able to perform several of its normal functions. In fact, blood can be said to perform functions that are relevant to the cells, the heart, the brain and the organs. It acts not only as a medium for transporting nutrients but also as a medium for taking out the trash so to speak. Containing necessary minerals, glucose, iron and oxygen, the blood is essential for the survival of the body cells, as well as the organs. If the blood was not able to carry these nutrients, the body would go into shock and not be able to function. Therefore, it can be said that the first function of blood is as a carrier of essential nutrients and oxygen to the different parts of the body. Another function of the blood is as a cleaning agent. Since the cells cannot dispose of the useless substances, wastes and toxins on their own, the blood is necessary. It carries these wastes and toxins to the kidney and the liver in order to filter the blood and dispose of these harmful toxins. If the blood is not present, there would be an unhealthy build up of these substances that would cause the body to cease carrying out its functions and result in death. Finally, the blood is important in that it carries white blood cells and encourages the healing process. It also encourages the healing process by distributing the white blood cells all over the body to raise its resistance. Also, white blood cells have anti bodies that prevent other viruses and diseases from taking over the body. As a whole, blood is extremely important if not crucial to the continued operation of the human body and its functions. The blood acts as a transmitter of the essential nutrients, as a waster disposal unit for all the unwanted wastes and toxins and finally, as a healing solution to ensure that the body is protected and functions well at all times. This is on top of the fact that it carries oxygen to all the other parts of the body, most especially the human brain.

Being Diagnosed With Bipolar Disorder - 968 Words

Before being diagnosed with Bipolar Disorder, I believed I was psychic. I would read tarot cards for people, I believed astrology was the best way to understand someone’s personality and anything with â€Å"ology† at the end of it was of interest to me. I read a lot about psychology as well. I noticed a correlation between people who claim to be psychic and people who suffer from mental illness. The example that stood out most to me was under the mania section of symptoms. Grandiose thoughts. I believed I was spiritually gifted. I believed I had been chosen for some sort of mission that would ultimately change the world for the better. It was ambitious thinking at least. I did not want to accept this finding. In my mind, spiritually gifted people were being locked up in a white room. Force fed pills that took their gift away. It was all a conspiracy to me. I spent years believing this. The reason I was suffering was because I was chosen to help the world. It was my cross to bear and eventually I would cross over to the â€Å"other side† and become some sort of angel. Sadly, it would be 30 years before I would receive my wings. Bipolar Disorder. So, does correlation equal causation in this case? Are people who possess psychic abilities in fact, mentally ill? Personally, I believe the answer to this question needs to be approached with caution. Are all psychics psychotic? No. Are there people claiming to be psychic when in fact they are suffering from mental illness? Yes and IShow MoreRelatedThe Problem With Bipolar Disorder1555 Words   |  7 Pagesadolescents being diagnosed with bipolar disorder over the last decade, which has caused the controversy on whether there is a bipolar disorder â€Å"epidemic† or not. Although there are obstacles in being diagnosed with bipolar disorder that may interfere with one’s everyday life, such as: manic episodes, mood swings, restlessness, impulsivity, potential harm to you and others, and much more. 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