1. Assume 20% of all email is spam. A large Internet provider plans on conducting a survey of 900 emails to see what percentage are spam. a. What is the probability they will get a proportion greater than 0.1836? b. If they get a sample proportion over 24% they are going to shut down their email server. What is the probability this will happen? 2. A survey is done to estimate the proportion of U.S. adults who think that cell phone use while driving should be illegal. In the survey‚ 54%
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Final Exam Review Part VI Definitions and Terms: Know the major definitions and terms for example 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Population Sample Descriptive Statistic Inferential Statistics Parameter vs Statistics Variable a. Categorical Statistic estimates Parameter b. Quantitative estimates ‚ sample mean ‚ population i. Discrete mean s‚ sample standard estimates ‚ population ii. Continuous deviation standard deviation Random Variable estimates
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Mechanisms of External Motivators on Overall Performance Motivation Sophia Lalani University of Oklahoma Abstract The present study randomly assigned 34 participants to one of four conditions: increased pay‚ decreased pay‚ elimination of pay‚ and the same pay. The participants received two candy bars of their choice for their participation in the study. The participants were administered a math competency task‚ following a bogus evaluation of pay rate based on participant performance on the task
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Sample Final MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Questions 1-4 The following is a set of data from a sample of size n( n=6): 1) Find the mean of the data set A) 15 B) 14 C) 10 D) 13.5 10‚ 17‚ -2‚ 10‚ 23‚ 26. 2) Find the standard deviation of the data set A) 9.33 B) 522.00 C) 104.40 D) 10.22 3) The five-number summary of the data set consists of __________‚ __________‚ __________‚ __________‚ and __________. A) -2‚ 10‚ 13.5‚
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harvard A Newsletter from Harvard Business School Publishing management update ARTICLE REPRINT NO. U0603C The Use and Misuse of Statistics For a complete list of Harvard Business School Publishing newsletters: http://newsletters.harvardbusinessonline.org For reprint and subscription information for Harvard Management Update: Call 800-988-0866 or 617-783-7500 http://hmu.harvardbusinessonline.org For customized and quantity orders of reprints: Call 617-783-7626 Fax 617-783-7658
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finished with school‚ I hope to be a Radiologist. A radiologist uses medical imaging technologies to diagnose and sometimes treat diseases. Originally it was the aspect of medical science dealing with the medical use of X-rays emitted by X-ray machines or other such radiation devices for the purpose of obtaining visual information as part of medical imaging. Due to the extensive training radiologists traditionally receive in medical image interpretation‚ radiologists now also direct other imaging technologies
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Chapter 23 Inference About Means Copyright © 2010 Pearson Education‚ Inc. Getting Started n n n Now that we know how to create confidence intervals and test hypotheses about proportions‚ it’d be nice to be able to do the same for means. Just as we did before‚ we will base both our confidence interval and our hypothesis test on the sampling distribution model. The Central Limit Theorem told us that the sampling distribution model for means is Normal s with mean μ and standard deviation
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Accounting 381 Reading Assignment 1: Accounting and Professionalism Due: Tuesday‚ January 12‚ 2010 (at beginning of class). Please be prepared to discuss the questions and your responses in class on this date. Required: Answer the following questions based on your examination of the readings listed below. This should be completed on an individual basis. Your discussion should be no more than 2 pages in length‚ single-spaced. You do not need to use a particular format to prepare your
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Population and Sample Our topic is about harmful effects that can affect a student’s performance in school and daily life. Our population of interest would be college students as they are the demographic most subject to many negative influences. Our sample would be stratified because we want to compare the answers of each of the classes: freshman‚ sophomores‚ juniors‚ and seniors. As a result‚ we would be able to see what types of harmful effects each class of students are most concerned about
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Chapter 1 Statistics is the science of: -Planning studies and experiments -Collecting data -Organizing‚ summarizing‚ and presenting -Analyzing -Drawing conclusions based on the data -Population: the complete collection of all measurements or data that are being considered. -Sample: sub collection of members selected from a population. -Census: collection of data from every member of a population. What does Statistics Do? -Collect data -Summarize the dataset collected -Make inferences
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