Premium Essay

Submitted By grumpycat

Words 9115

Pages 37

Words 9115

Pages 37

Question 2: The average rate of occurrence of accidents was 8.15 per week. A) during that time, what is the probability of getting less than 3 accidents a week? Use poisson for this question. Since it is less that 3 accidents, x = 0,1,2 (Px=o) = [(8.15^0) (e^8.15)] / 0! = 0.00288735. (Px=1) = [(8.15^1) (e^8.15)] / 1! = 0.002353193. (Px=2) = [(8.15^2) (e^8.15)] / 2! = 0.009589362. Add all these results together, and p(x<3) is 0.01223119. B) The probability if an accident on the road is 0.295. Out of 10 reportable accidents, what is the probability that 2 occurred on the road? Use Binomial for this. Since it is exactly 2, we need to find P(x=2). Use the binomial formula, n = 10, x = 2, p = 0.295, and q is 0.705.

= 10!/2!(10-2)! * 0.205 ^2 * q^ 10-2. Answer is 0.23898436.

Question 3: 15% of drivers have a probationary license and 85% have a regular license. In a given year, 10% of drivers with probationary licenses are involved in an accident. 2.5% of regular drivers are involved in an accident. For this question it is better to draw a tree diagram.

Question 4: Mean values for income for men are 100K, for woman, 80K. SD deviations of 20K and 15K respectively. Variables are normally distributed and independent.

Calculate the 95th percentile, for men income. 95th p = 0.95. In the zscore table, we find a value of 1.64. Us e the formula for z-score (population) : 1.64 = x -100/ 20. Solve for 132.8K

Calculate the Q1, Q3, and the IQR for women’s income. Q1 = 0.25. Z score of 0.67. Us e the formula for z-score (population) : 0.67 = x -80/ 15. Solve for 69.95K. Q3= 0.75. Z score of 0.67. Us e the formula for z-score (population) : 0.67 = x +80/ 15. Solve for 90.05. IQR is Q3-Q1. = 20.1K.

What are the probabilities of a man having an income of more than...

Premium Essay

...Chapter 1 – Introduction to Statistics 1-1 Review and Preview * Data – are collections of observations, such as measurements, genders, or survey responses. (A single data is a called a datum, a term that does nog see very much use.) * Statistics – is the science of planning studies and experiments; obtaining data; and then organizing, summarizing, presenting, analyzing, and interpreting those data and then drawing conclusion based on them. * Population – is the complete collection of all measurements or data that are being considered. * Census – is the collection of data from every member of the population. * Sample – is a sub-collection of members selected from a population Statistics Cheat Sheet Chapter 2 – Summarizing and Graphing Data Section 2-1: Review and Preview * Characteristics of Data * 1. Center: A representative value that indicates where the middle of the data set is located. * 2. Variation: A measure of the amount that the data values very. * 3. Distribution: The nature or shape of the spread of the data over the range of values (such as bell-shaped). * 4. Outliners: Sample values that lie very far away from the vast majority of the other sample values. * 5. Time: Any change in the characteristics of the data over time. * Study Hint: Blind memorization is not effective in remembering information. To remember the above characteristics of data, it may be helpful to use a......

Words: 953 - Pages: 4

Premium Essay

...Due on 4/29 * Test corrections * Final Paper – Hard Copy * Final Exam – 15 questions – each worth similar points * Review midterms 1, and 2 in its entirety * Chapter 14 and 15 new material – complete the problem set on blackboard * Blue book and tables and calculator * 2 sides of 8 x10 * 14 and 15 all sections – not going to give us 30 observations and ask us to calculate the coefficient. No calculation formulas in the chapters. Put on the cheat sheet what a generic model looks like, a generic estimation. * Might have to interpret residuals, what is the formula for residuals, why do we calculate residuals. * Residual is the difference between the observed value and expected value of y…I think…… So imagine that I am in the city council and I want to be able to estimate the number of police officers for my city, From my data set I want to look at the relationship between officers and crime. Maybe the best way to complete this is to look at population. My initial hypothesis is that the size of the city is going to determine the number of officers. This means that my alternative hypothesis is that there is no connections between the size of the city and the number of officers. The intuition behind this is that the larger the city in square miles, the more officers we need patrolling the area. Moreover, it makes sense that the amount of crime also is connected to the number of officers. In order to begin to understand the......

Words: 1107 - Pages: 5

Free Essay

...T B EO C N E T : AL F O TN S Peae rfc A o th po rm b u te rga G n rl d i o pe aainpoes e ea a v e n rp rt c o rcs C Al e1 xm -h b gn ig f ln ra F e l ea te einn o a o g o d v C Al e2 xm - a w y h r F e l ea h l a tee v f C Al e3 xm -h l t l F e l ea tea mi v s e O h r sflno te ueu if Tp fr a dd ts iso cn iae Atr od f wr e 1 4 1 0 2 2 5 5 6 6 7 1 8 9 9 7 Guide for the CFA exam by TimePrep PREFACE Welcome to the world of the CFA program! Since you're reading this, it is likely that you are a CFA candidate, or you are considering becoming one. Either way, we hope that you will ﬁnd this book helpful. The general idea behind this book is to oﬀer CFA candidates useful advice, written by other CFA candidates and charter holders. There are several segments of the book and we recommend going through them all since it is not a heavy read, and it may prove useful for your preparation. The book starts with general information about the CFA program – the basics of the program, beneﬁts of attending it, the complexity of the program in whole etc. In the second chapter we will provide you with some general advice in preparation – how to organize your time, what strategy elements to use, how to ﬁnd time for studying and also an overview of the various prep tools that can help you. The following three chapters of the book are each related to one of the levels of the CFA Exam – here you can read various useful information regarding study materials, types of questions that appear...

Words: 17281 - Pages: 70

Premium Essay

...ATTITUDES AND SOCIAL COGNITION The Dark Side of Creativity: Original Thinkers Can Be More Dishonest Francesca Gino Harvard University Dan Ariely Duke University Creativity is a common aspiration for individuals, organizations, and societies. Here, however, we test whether creativity increases dishonesty. We propose that a creative personality and a creative mindset promote individuals’ ability to justify their behavior, which, in turn, leads to unethical behavior. In 5 studies, we show that participants with creative personalities tended to cheat more than less creative individuals and that dispositional creativity is a better predictor of unethical behavior than intelligence (Experiment 1). In addition, we find that participants who were primed to think creatively were more likely to behave dishonestly than those in a control condition (Experiment 2) and that greater ability to justify their dishonest behavior explained the link between creativity and increased dishonesty (Experiments 3 and 4). Finally, we demonstrate that dispositional creativity moderates the influence of temporarily priming creativity on dishonest behavior (Experiment 5). The results provide evidence for an association between creativity and dishonesty, thus highlighting a dark side of creativity. Keywords: creativity, ethics, morality, moral flexibility, unethical behavior Evil always turns up in this world through some genius or other. —Denis Diderot (1713–1784) The ability to generate...

Words: 12835 - Pages: 52

Premium Essay

...CHAPTER1&2 Cheat Sheet Range = Max –Min Mean =average Median=median Mode=mode Descriptive Statistics: Collecting, organizing, summarizing, and presenting data in a numerical or graphic form. (Average; high, low; % change; predict forecast) Inferential Statistics: process of making conclusions using data that are subject to random, variation, for ex; observational Stratified Random Sample: divide the population into segments, - “strats” Systematic Random Sampling: Starting at a random point in the listing of units of the frame, instead of starting at the first unit. Bin: is highest number in each class ex: 40 to under than 50 would 49 Relative Frequency- You take the first number from the first cell of FREQUENCY and you / by your TOTAL (MAKE SURE TO ADD $$$$$$$$) Less Than Cumulative Frequency-The students from 40 to under 50 = 3 second Cell is “=(50 to under 60)” will add then drag down (In the first cell you take from the LESS THAN CUMM. FREQUENCY FIRST CELL and you / from the TOTAL.) More Than Cumulative Frequency- In the first cell you just copy and paste from the first cell of FREQUENCY. In the SECOND cell, you copy your first cell from this Cullum and you – your TOTAL.The first cell is the total of frequency.The second cell is “=(with the “30” on top, subtract the number in the frequency column) Formula Px= Lx + I (x) (N (x) x/ 100- Efc)Fx This formula is only used for GROUPED DATA Percentiles =percentile.exc ( A1 : A30 ) only use this......

Words: 527 - Pages: 3

Free Essay

...10/23/2015 Solutions (2x^2sqrt(ab^3))(3xsqrt(a^3b^3)) Step by Step Calculator Symbolab j's Notebook Practice Cheat Sheets ACT English Coming Soon! Blog Help Step by Step Calculator Solve algebra, trigonometry and calculus problems step-by-step Enter a topic Pre Algebra (new) Factors & Primes Fractions Long Arithmetic Like full pad » x 2 x □ x□ log□ ∂ ∂x ∫ □ □ ≤ ≥ □ □ ÷ lim ∫□ d dx (☐)' √☐ √☐ ∑ ∞ θ Follow ( f ◦ g) x ◦ π Decimals Exponents & Radicals Percents Mean, Median & Mode ( 2x2√ ab3 )( 3x√ a3b3 ) Examples » Algebra Matrices & Vectors Functions & Graphing Geometry (new) Go ( 2√ Solving 2x 3 ab )( 3x√ a3b3 ) ( Solve f ( x ) = 2x 2 √ ab3 )( 3x√ a3b3 ) instead » Solution Trigonometry Calculus Statistics ( 3x√ a3b3 )( 2x2√ ab3 ) = 6x3√ ab3 √ a3b3 « Hide Steps Related Symbolab blog posts Steps Practice Makes Perfect ( 3x√ a3b3 )( 2x2√ ab3 ) Learning math takes practice, lots of pra Just like running, it takes practice and Remove parentheses: = 2 · 3x x√ ab 2 2 3 2 = 6x 3 1+2 all types of math, you need... 2· 3=6 √ a 3b 3 Apply exponent rule: x x= x dedication. If you want to be really goo √ a 3b 3 3 Multiply the numbers: = 6x x√ ab (a) = a = x b c a · a =a My Notebook, the......

Words: 403 - Pages: 2

Premium Essay

...NORTHEASTERN UNIVERSITY - GRADUATE SCHOOL OF BUSINESS ADMINISTRATION MGSC 6200: DATA ANALYSIS Spring, 2015 Instructor Information Name: Dr. Nizar Zaarour E-mail address: n.zaarour@neu.edu Office: 214 Hayden Hall Office hours: Monday and Wednesday: 12 – 2 PM and by appointment. Course Overview The objectives of this course are: (1) To provide you with an understanding of statistical methods and techniques and their usefulness in the decision-making process, (2) To expose you to the methods of descriptive and inferential statistics and how can be used to solve business problems, (3) To improve upon your data analysis and computer skills, (4) To help you develop the skills to recognize the appropriate statistical tool to analyze business problems, and (5) To provide you with the necessary tools for critical evaluation, correct interpretation, and presentation of the results of statistical analyses. Textbook and Software 1) Business Statistics: For Contemporary Decision Making, 7th Edition, by Ken Black, (Wiley). 2) Microsoft Excel. Course Organization The course web page is located in the Blackboard system at http://blackboard.neu.edu. Course materials and announcements will be posted on the course site. A Blackboard tutorial is available at http://www.discoveringblackboard.neu.edu. The textbook is quite easy to read and covers a lot of ground. However, some of the topics are not covered in depth. Class discussions, handouts, and my lecture notes will fill these......

Words: 1018 - Pages: 5

Premium Essay

...“Attendance Monitoring in EARIST” INTRODUCTION The emergence of electronic paradigm for learning compared to traditional method and availability of almost all information on the information superhighway(Internet), nowadays have caused students to be less motivated to come to the lecture rooms than ever before. Laziness on the part of students, nonchalance to school work, extra social activities that have no importance in aiding the objectives of the institution and a lot more, may prevent students from attending lectures. Sequel to these, lecturers and administrators in most developing countries have had to come up with ways to ensure a healthy participation from students, and make sure that the student-lecturer interactive relationship is kept intact. This in some cases have come in simple forms like roll calls, while in more interesting cases, can be formats like surprise quizzes, extra credit in class, etc. These strategies are however time consuming, stressful and laborious because the valuable lecture time that could otherwise been used for lectures is dedicated to student attendance taking [8] and sometimes not accurate. In addition to all these challenges, the attendances are recorded manually by the tutor and therefore are prone to personal errors. There arises a need for a more efficient and effective method of solving this problem. A technology that can solve this problem and even do more is the RFID technology. RFID is an automated identification and......

Words: 1281 - Pages: 6

Free Essay

...businesses involve the Enron case, a case concerning an energy company declaring bankruptcy after keeping huge debts off their balance sheet (para. 10). This also caused a lot of chaos in the stock market. Another case is the one involving WorldCom, where assets were inflated, which eventually lead to the internal auditing department uncovering fraud (para. 17). These cases display why a code of conduct is essential in the business environment. The American Society of CPA’s (AICPA) has a professional code of conduct that Certified Public Accountants (CPA) must abide by while engaging in their practice. The code of conduct consists of rules a CPA should adhere by when engaging in services with their respective client(s). It also explains how to appropriately handle certain situations. If a CPA violates the code of professional conduct, they are subject to disciplinary actions, which in include being terminated as a CPA, suspension, and having your wrongful action posted to the website for a certain amount of time allowing people of the public to view. The AICPA has a senior committee known as the Professional Ethics Executive Committee (PEEC), and they are charged with enforcing the professional code of conduct for the AIPCA. According to the AICPA, in order for an investigation against an AICPA to occur, a letter of complaint must be mailed to them (para.1). In my opinion, there should be a better way for individuals to contact the PEEC if they have...

Words: 1130 - Pages: 5

Premium Essay

...Mission statements are an essential element of a company’s organizational strategy and serve as foundational guides in the establishment of company objectives. They embody the philosophies, goals, and ambitions of a company and should offer insight into what company leader’s view as the primary purpose for being in business. A mission statement is quite possibly the most important issuance that a company has to offer to all of its customers or consumers. It can help focus the organization on what really matters to itself as well as its stakeholders. They act as the glue that binds organizations together through the guidance of strategic and day-to-day operational decisions. An effective mission statement indicates how a firm is unique in its scope of operations and its products or service offerings. In addition, it proclaims corporate purpose, what the organization tends to accomplish, the market in which the firm intends to operate, and the philosophical bounds that are to guide their actions. The coffee industry has boomed in recent years. While fast food chains are growing at a rate of 2% each year, coffee shop chains grow more than 10% annually. According to the National Coffee Association Annual Drinking Trends Survey, “Even though 75% of the cups of coffee brewed daily are consumed at home, 66% of Americans buy their coffee outside of their homes.” This creates a strong demand in the coffeehouse market. Statista defines coffeehouses as “small establishments selling......

Words: 2317 - Pages: 10

Free Essay

...The No Child Left Behind Act By: Carroll Zentz Abstract The No Child Left behind Act is a law that was formulated by George W. Bush within one week of being in office in 2001. A few months later the law passed in January of 2002. The reason the No Child Left behind Act was enacted was to better the education for the children of America. The No Child Left behind Act is a very controversial topic, due to the lack of funding provided by the government, and how teachers get laid off for not being deemed �highly qualified� teachers. However, statistics have indicated that the No Child Left behind Act has helped to make an improvement in the education for the youth of America. No Child Left Behind Act The No Child Left behind (NCLB) Act is now a United States federal law that was created to improve the public school system. This is the first amendment that has been made since the Elementary and Secondary Education Act of 1965. President George W. Bush felt that the Elementary and Secondary Education Act of 1965 was inadequate. So he devised his own way to try and improve it, thus creating the No Child Left behind Act. Another reason George W. Bush created the No Child Left behind Act is because he was noticing that the achievement gap between minority students and white students was growing. The No Child Left behind Act has many theories that should equal perfection according to President Bush. Some of these theories entail all students being proficient by the......

Words: 1913 - Pages: 8

Free Essay

...O Foreword About OWASP About OWASP The Open Web Application Security Project (OWASP) is an open community dedicated to enabling organizations to develop, purchase, and maintain applications that can be trusted. At OWASP you’ll find free and open … • Application security tools and standards • Complete books on application security testing, secure code development, and security code review • Standard security controls and libraries • Local chapters worldwide • Cutting edge research • Extensive conferences worldwide • Mailing lists • And more … all at www.owasp.org All of the OWASP tools, documents, forums, and chapters are free and open to anyone interested in improving application security. We advocate approaching application security as a people, process, and technology problem, because the most effective approaches to application security require improvements in all of these areas. OWASP is a new kind of organization. Our freedom from commercial pressures allows us to provide unbiased, practical, cost-effective information about application security. OWASP is not affiliated with any technology company, although we support the informed use of commercial security technology. Similar to many open-source software projects, OWASP produces many types of materials in a collaborative, open way. The OWASP Foundation is the non-profit entity that ensures the project’s long-term success. Almost everyone associated with OWASP is a volunteer, including the OWASP Board, Global......

Words: 5349 - Pages: 22

Premium Essay

...￼Reproducible Skills Pages, Including: >>Body & Brain Science >>Reading Comprehension >>Graphs, Charts >>Critical Thinking >>Sequencing 14 Drug Education Activities FROM SCHOLASTIC AND THE SCIENTISTS OF THE NATIONAL INSTITUTE ON DRUG ABUSE, NATIONAL INSTITUTES OF HEALTH, U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES STEPHEN KRONINGER(ILLUSTRATION) ￼Dear Teacher, One of the most important things you can do as a teacher is to give your students information about the health effects of drug abuse. Together with the National Institute on Drug Abuse (NIDA), we’ve put together this 16-page book of reproducibles, full of facts and activities on drugs of abuse. This book is just one component of our ongoing drug education program, “Heads Up: Real News About Drugs and Your Body,” a partnership between NIDA and Scholastic Inc. These skills pages can be used alone or to support and extend the feature articles that appeared in your classroom magazine in the 2002- 2003 school year and are continuing this year. This book includes an introduction to the brain, that crucial organ so vulnerable to drugs of abuse. Then, we focus on the health effects of specific drugs, including marijuana, inhalants, nicotine, steroids, prescription drugs, club drugs, heroin, and cocaine. While you can use these reproducibles to support a drug education, health, or human-body science curriculum, the activities extend into other areas. In order to complete the activities, students must read charts and......

Words: 5647 - Pages: 23

Free Essay

...CHEATING Definition Cheating is defined as the intentional act of breaking the rules, or attempting to achieve personal gain through fraud or deceit.16 To cheat is to deprive of something valuable by the use ofdeceit or fraud, to influence or lead by deceit, trick, or artifice, to practice fraud or trickery, to violate rules dishonestly, or to be sexually unfaithful.11 A cheater (sometimes called acheat) gets something by dishonesty or deception; or by depriving one of his or her rights and usually connotes deliberate perversion of the truth; or by large-scale cheating bymisrepresentation or abuse of confidence.11 Cheating is an act of lying, deception, fraud, trickery, imposture, or imposition. Cheating characteristically is employed to create an unfair advantage, usually in one's own interest, and often at the expense of others. Cheating implies the breaking of rules. Cheating is a primordial economic act: getting more for less, often used when referring to marital infidelity.3 Cheating is when a person misleads, deceives, or acts dishonestly on purpose.17 Cheating fundamentally includes several elements of both lying and stealing, with specific motivations to gain something of value by illegitimate means. That is why lying and stealing are discussed before cheating. Cheating is lying and/or stealing with the intention for acquiring something for more than merely the "pleasure" of fooling or depriving others. Children Cheating as a concept is not understood by......

Words: 19938 - Pages: 80

Premium Essay

...Statistics Cheat Sheet Proportion = Frequency x 100 = Percentage Total No | Z score (standardised value)-how many sds from the mean the value liesZ score = data value – mean Standard deviation | Metric Data = ExploreCategory = Frequencies | Bigger sample size will give a narrower confidence interval range (more specific) outliers affect the mean but not the median – this is why the median is preferred here. | | Reports -Only give confidence interval if signicant-All values to 2 dec pts except the p-value Experimental = IV is manipulated to see the effect on the DV Observational = Information just observed & recorded | P-Value Significant Figurep-value < 0.05 = Significantp-value < 0.05 = Not Significant The probability that our test statistic takes the observed value Always leave at 3 decimal places | Levene’s Test-Used to test if equal variancesIf significant (<0.05)– use equal variances not assumed rowIf not significant (>0.05)– use equal variances assumed row | Dependent Variable = the variable in which we expect to see a changeIndependent Variable = The variable which we expect to have an effect on the dependent variable Example: There will be a statistically significant difference in graduation rates of at-risk high-school seniors who participate in an intensive study program as opposed to at-risk high-school seniors who do not participate in the intensive study program." (LaFountain & Bartos, 2002, p. 57)IV:......

Words: 1923 - Pages: 8