Normal distribution Essays

Contextual outlier: during a normal week, Joe usually charges around $100 to his credit card. During the week leading up to Christmas, Joe charges over $1000 to his credit card. Out of context, this may look like fraud but because we know people’s spending habits around the holidays it probably isn’t an outlier. b. Collective outlier: Let’s say Dr. Velkoski teaches three night classes here at DePaul each week. Each class has 25 students enrolled. If we take a look at the distribution of attendance and students

considered normal, between +12 μm and +15μm are suspicious, and more than +15 μm are typically indicative of keratoconus. Similar numbers about 5 μm higher apply to posterior elevation maps. 2. Anterior curvature map (Tomidokoro et al., 2000): The steepening of the cornea, irregular astigmatism, inferior steepening (I-S difference), location of steepest point and the thinnest point on the cornea may help in the diagnosis of keratoconus. 3. Pachymetry and thickness distribution maps (Ambro´sio

standard normal curve between z = 0 and z = 1.65. Answer: The value 1.65 may be written as 1.6 to .05, and by locating 1.6 under the column labeled z in the standard normal distribution table (Appendix 2) and then moving to the right of 1.6 until you come under the .05 column, you find the area .450 . This area is expressed as 2. Find the area under the standard normal curve between z = -1.65 and z = 0. Answer: The area may be represented as . Since the normal curve

Chapter two reviews probability and the normal distribution. Probability equals the number of events meeting the specified condition divided by the number of possibilities (Mirabella, p. 2-1, 2011). For example, my organization two primary products. Those products are orange postal bags and brown boxes. Forty percent of the volume consists of orange postal bags. A simple probability question could be as follows; out of ten packages, how many postal bags are processed. The answer would be four out

Bottling Company Case Study As a manager at a major bottling company, customers have complained that the bottles of the brand of soda produced in the company contain less than the advertised sixteen (16) ounces of product. There is need to solve the problem at hand and has to be investigated. Employees are instructed to pull thirty (30) bottles off the line at random from all the shifts at the bottling plant and measure the amount of soda there is in each bottle. The table (i) below shows the number

analysis in economics, event history analysis in sociology and medical researchers give it the name of survival analysis. Survival analysis is used because the survival data are generally not symmetrically distributed, so it can not follow the normal distribution. The survival data depend on the time and it render standard methods in which the survival times are frequently censored [1]. Censored data arises when the study end and the patient still alive, a patient is lost to follow-up during the study

that the standard error of the mean is the standard deviation of a sampling distribution of means. I understand how to calculate the SEM (simply divide the standard deviation of the sample by the square root of the sample size minus one). I understand that SEM is not the same as standard deviation. I also recognize that if the sample size is increased, the standard error of the

Analysis of Variance (ANOVA) is a statistical method used to test differences between two or more means. Though it is called "Analysis of Variance" but actually it is "Analysis of Means." ANOVA was developed by Ronald Fisher in 1918 and is the extension of the t and the z test. Before the use of ANOVA, the t-test and z-test were commonly used. But the problem with the T-test is that it cannot be applied for more than two groups. This test is also called the Fisher analysis of variance, which

ENG20400 Critical Theory Worksheet 1 Emma Treacy (16413544) Questions 1. Give a basic definition/description (50-100 words for each definition) of two of the following terms mentioned in Williams’ article: new criticism; new formalism; close reading; distant reading. 2. Identify five descriptive words or phrases that are associated with ‘symptomatic reading’ in the essay. What criticisms of symptomatic reading are reported in the essay? (100-150 words) 3. This article suggests differences in method

Most people considers Intelligent Quotient (IQ) as an important factor to succeed in their career as professionals, while on the other hand, Emotional Intelligence (EI) are sometimes neglected. Intelligent quotient is usually inborn while Emotional Intelligence can be developed in an individual. Some people are not aware of the importance and benefits of being emotionally stable and its contribution to their success as an individual. As a person, success depends on how one handles their own emotion

Xin nian kuai le, gong xi fa cai- The dog zodiac is the 11th in the 12 – year cycle. Before the pig year and after the rooster year. Some of the years of the dogs are 1922, 1934, 1946, 1958, 1970, 1982, 1994, 2006, 2018, 2030, 2042… In Chinese there are 5 elements gold (metal), wood, water ,fire and earth, so there are 5 types of dogs. Dog is a mans good friend who cares, obeys and understands his master. If a dog comes to a house it symbols that there will be fortune coming. Dogs are loyal, kind

Cancer risks will be considered “essentially negligible” where the estimated ILCR is 1-in-100,000 (≤ 1 x 10-5) (Health Canada 2004). If the ILCR is greater than 1 x 10-5, the risk assessment should either be refined and/or risk management measures should be taken. In this study, ILCR is greater than 1 x 10-5. ILCR values in different tissues such as mussels and liver 3 species of coral island of Persian Gulf were in the range of 0.032677 - 0.044428. Thus documenting high potential carcinogenic risk

Motivation is the force that keeps us moving in order to perform our activities. Often, as teachers, we hear and witness that the students do not demonstrate any kind of interest for the academic matters and that they are not motivated. But, more often, what happens is that they are in fact motivated to do other kind of tasks, which are more pleasant for them. Motivation is the interest students have for their own learning or the interest for the activities that lead them to learn something. This

In this lab there were five different stations. For the first station we had to determine an unknown mass and the percent difference. To find the unknown mass we set up the equation Fleft*dleft = Fright*dright. We then substituted in the values (26.05 N * 41cm = 34cm * x N) and solved for Fright to get (320.5g). To determine the percent difference we used the formula Abs[((Value 1 - Value 2) / average of 1 & 2) * 100], substituted the values (Abs[((320.5 - 315.8) / ((320.5 + 315.8) / 2)) * 100])

Calculation: Initial Mass(g)－Final Mass (g)=Change in Mass (g) Trial 1 74.5-62.0=12.5(g) Trial 2 272.7－271.5=1.2（g） Percent Error: 272.7-271.5 x 100 272.7 ＝0.440% Percent Change: 74.5-62.0 x 100 74.5 (Trial 1) =16.778% 272.7-271.5 x 100 272.7 (Trial 2) ＝0.440% Conclusion: Compare Trial 1 and Trial 2. The Trial 1 change in mass are 12.5g, however Trial 2 changes

Statistics Assignment Seven This paper will use inferential statistics to test two different research questions. There will be two different types of statistical test that will be used. The first statistical test will be a Chi-Square for independence and the second test will be a Person r test. Both test will have the seven hypotheses testing steps explained, descriptive discussion of the variables, possible errors and critique of research methods and implications for research and nursing practice

In standardized tests and tests in general, the mean is the average score derived from a group of scores. The mean is determined by adding up all the scores and dividing the sum by the number of scores added (Woolfolk, p. 632, 2013). The median, as the name implies, is the middle score. The median lies at the midpoint of a set of scores, with an equal number of scores distributed above it and below it. The mode is essentially the score that occurs the most often. Standard deviations measure how spread

Lab Report 1 Logarithmic Plotting Devin Edwards ENGR 3070L CRN: 27194 January 17, 2018 Dr. Margraves Objective The purpose of this experiment is to graph and look at the logarithmic plots and write corresponding exponential equations that match the “Best Fit” line of the data points. Theory The data in Table 1 can be represented by the exponential equation given in equation 1 below. Equation 1 is also used for Cartesian plots: Q=KH^n (1) On this type of plot a straight line

the dynamical system into a regular stationary process produces such a sequence, then the dynamical system is called a Bernoulli system. 1.6.1 Deterministic Chaos Small differences in initial conditions (such as those due to rounding errors in numerical computation) yield widely diverging outcomes for chaotic systems, rendering long-term prediction impossible in general. This happens even though these systems are deterministic, meaning that their future behavior is fully determined by their initial

Definition, Characteristics, and Etiology or Causes It is only in the 1960’s that the term ‘learning disabilities’ were used to refer to severe learning problems of individuals in order to provide administrative convenience and focus of advocacy. Although findings related to learning disabilities date back in the 1800s, Learning Disabilities is still a new area of Special Education and there is no single agreed upon definition of it yet. One influential definition that is accepted by most educators