Statistical power Essays

  • Bottleneck Theory Essay

    1773 Words  | 4 Pages

    One of the earliest models investigating attention was developed by Broadbent (1954, 1971 cited in Edgar 2007) who considered that incoming information on different sensory "channels" was selectively filtered and that only one stream could be semantically processed at a time. This model typified the "bottleneck" approach to selective attention. His work focused on filtering and the early stages of processing. The bottleneck operates by filtering out sensory information on the basis of physical characteristics

  • College Admissions Essay: The Beauty Of Numbers

    676 Words  | 2 Pages

    that I had a genuine interest to applying mathematical and statistical theories to real-world concerns.  Hey, even Twain the skeptic realized the importance of balancing the cargo on shallow, difficult-to-navigate riverboats so that the port and starboardsides were equally laden-he even advised the captains to part their hair down the middle so that the weight was perfectly distributed!  

  • Exploring Inferential Statistics and Their Discontents

    2108 Words  | 5 Pages

    confidence (Hopkins, Marshall, Batterham, & Hanin, 2009). What is the General Linear Model (GLM)? Why does it matter? The General Linear Model (GLM) is an important cornerstone that delivers a comprehensive and prevalent mathematical structure for statistical analyses in applied social research (Trochim & Donnelly, 2008; Zheng & Agresti, 2000). GLM is a system that measu... ... middle of paper ... ..., M., Oort, F., & Sprangers, M. (2013). Significance, truth and proof of p values: reminders about

  • Statistical Investigation on Car Prices

    1938 Words  | 4 Pages

    Statistical Investigation on Car Prices Data Collection: We are asked to find the relationship between prices of ‘51 registered’ cars and variables such as their current new price, mileage and weight by using the regression analysis. To collect full information of these registered cars, we can access to the websites like: http://www.exchangeandmart.co.ukHowever, in this easy, we use the data, which are provided with the assignment by our teachers. By the sources, 100 cars, which

  • Significant Figures

    686 Words  | 2 Pages

    way that scientists easily handle very large numbers or very small numbers. It is comprised of two parts: the coefficient and the exponent. The coefficient is always rounded to the proper number of significant digits. While the exponent (always to a power of ten in Chemistry) is inserted to make sure that the exact placement of the decimal point for the accurate full number is known. Therefore, 377,000 to two significant figures would be 3.8x10^5g. The standard way of writing a number in scientific

  • Statistical Investigation Into Height and Weight of Students

    3097 Words  | 7 Pages

    Statistical Investigation Into Height and Weight of Students My hypotheses are as follows: ~ 1. Year 11 students are, on average, taller than year 9 students. 2. There is better correlation between height and weight in year 7 than there is in year 11. 3. The taller someone is the heavier they are. Below are the sampling methods that I have used in my coursework: Stratified Simple Random Stratified sampling can be defined as the process where the population is divided into

  • Bakersfield Police Hypothesis

    1685 Words  | 4 Pages

    one-hundred residents within Bakersfield city limits provided the necessary background need to develop ten hypotheses. The results for the ten hypotheses is discussed in detail below. Each hypothesis were run to demonstrate whether there was a statistical significance between the two variables. All hypothesis were translated using an adjusted standardized residual of + or – 1.96. By using an adjusted residual the groups illustrated where the majority of the relationship was concentrated. The

  • What Are The Difference Between Descriptive And Inferential Statistics

    1130 Words  | 3 Pages

    tested or not. If the null hypothesis was not present, the number of possibilities would make it impossible to test. Also at the beginning of the research the null hypothesis can make the research more objectively based and play a key role in the statistical analysis as results become available. Ultimately, then, with the degree of the null hypothesis and its probability (p) it can be determined rather it is rejected in lieu of alternative hypothesis (Patten,

  • Statistical Investigation

    2172 Words  | 5 Pages

    Statistical Investigation Introduction I have chosen to do this statistical coursework that uses data from 'Mayfield High School.' Although this is a fictitious school, the data is based on a real school. As the data has been collected for me, it is called secondary data. I believe that this coursework will allow me to illustrate my ability to handle data, use specific techniques and apply higher level statistical maths by being able to use a variety of methods in order to analyse

  • Statistical Investigation

    2980 Words  | 6 Pages

    Statistical Investigation For my Maths GCSE's I am required to do two pieces of coursework one of which is a piece on statistics. The purpose of this project is to help me investigate a real life situation using statistics. In this case I have been given some quantitative data on the end of year maths test scores of children in year 8. What I am supposed to do is compare the data by making hypotheses to indicate if there is something comparable between the results. First I have decided

  • Statistical Investigation

    3796 Words  | 8 Pages

    Statistical Investigation All graphs should be attached. An Investigation into the Relationships between the Heights and Weights of a Rangeof Studentsat Mayfield High Aim I aim to investigate the relationship between the heights and weights of a range of students from different demographics at "Mayfield High". Prediction I. I predict initially that the average male height will be greater than the average female height. That is due to biology stating that males are, on average

  • Statistical Investigation into Rollercoaster Data

    1486 Words  | 3 Pages

    Statistical Investigation into Rollercoaster Data I am going to be completing a statistical investigation from some collected data. This will be obtained from a World Rollercoaster Database. The information that can be seen from the database about an individual rollercoaster is: which country designed it, when it opened, its height, its length, its max speed, the ride time, and the thrill factor out of 10. I am going to investigate whether the fastest rides are the most exciting. I would

  • The Impact Of Descriptive And Inferential Statistics

    1066 Words  | 3 Pages

    collection of quantitative data and various sampling methods as a way to help find intuitive ways to solve the problems they have, or to make what they better. There are several ways to collect meaningful data, using both descriptive and inferential statistical methods. For example, in a business setting descriptive statistics can show an increasing trend in profits, however if you look at the inferential statistics of customer satisfaction surveys we may see a decline. This would lead you to say, profits

  • The Power of Prayer

    1391 Words  | 3 Pages

    The Power of Prayer Introduction There is a great deal of anecdotal evidence about the efficacy of prayer in healing. As mentioned at the beginning of chapter eight in our text, many people have friends or relatives who recovered from illnesses when someone was praying for them, or who can attest to the power of prayer in other affairs. This makes scientists wonder. Can prayer help heal the sick? Do meditations for the recovery of an ill person, based either on religious faith or on

  • Power Law Relationships in Insurgency-Based Conflict

    675 Words  | 2 Pages

    of Sean Gourley and his crew regarding power law relationships they’ve found in insurgency-based conflict. For some quick background, go here: http://seangourley.com/ and watch the 7 minute TED video. Let me be frank. This is another prime example of academics armed with mathematical/statistics based techniques run amok with statistical inference and a naïve belief that it can predict the future. First, let’s get some perspective. The discovery of power law relationships in conflict is not new

  • Japan's Purple Machine

    3866 Words  | 8 Pages

    Japan's Purple Machine Codes and ciphers have played many crucial roles in the past 3000 years, protecting the secrets of caesars and laymen. In World War II numerous nations used cryptographic systems to conceal their secret intentions and plans from the spying eyes of enemies everywhere. Cryptanalysts, however, undeterred by the complexity of the crypto-systems, worked diligently, trying to find any sort of weakness that would allow a break into the cipher and expose the secrets contained within

  • Free Affirmative Action Essays - Affirmative Action is Reverse Discrimination

    606 Words  | 2 Pages

    or national origin. As a policy setting out to resolve the problems of discrimination, Affirmative Action is simply nothing more than a quota of reverse discrimination. Affirmative Action emphasizes prospective opportunity more towards statistical measures.  It promotes the hiring and acceptance of less experienced jobs of the workforce and less able students.  Sometimes the affirmative action policies forces employers and schools to choose the best workers and less privileged students

  • Congruence of Counselor Self-Disclosure and Perceived Effectiveness

    1844 Words  | 4 Pages

    The first research article I read for this assignment was Congruence of Counselor Self-Disclosure and Perceived Effectiveness by Scott J. Nyman, and Timothy K. Daugherty. This journal article documents an empirical study conducted by Scott Nyman and Timothy Daugherty examining the effect of counselor self-disclosure on the relationship between counselor and client. Counselors and researchers differ in their opinions regarding the use of self-disclosure. Some consider it a means to establishing a

  • Springdale Shopping Survey

    905 Words  | 2 Pages

    In a continuation of the Springdale Shopping District Survey, use of confidence intervals is introduced to improve upon the evaluation of the quality of the statistics derived from the survey of a sample population. There has historically been an assumption that the respondents represent a simple random sample of all potential respondents within the community and that the population is large enough that application of the finite population correction would not make an appreciable difference in the

  • Gulf View Real Estate

    658 Words  | 2 Pages

    sample data will be used to provide the appropriate descriptive statistics to summarize each of the three variables and determine outliers for both Gulf view Condominiums and No Gulf View Condominiums. Once this information is provided specific statistical results that would help a real estate agent understand the condominium market will be discussed. Then a 95% interval estimate for the population mean sales price and the population mean number of days to sell will be calculated with an interpretation