Catherine Davison October 22‚ 2013 Summary #4 Chapter 8 – Post Hoc Rides Again The Post – hoc analysis which is the cause and effect problem. Methods of presenting cause and effect: 1) present a result without a significance value 2) use untestable assumptions 3) use precision and accuracy interchangeably 4) perform nonsensical test that sound good. Keep in mind that a statistic is only worthwhile when it satisfies the assumptions on the test. Knowing whether the assumptions are met is
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Descriptive & Inferential Statistics The study of statistics plays a significant role in each of our lives. Statistics is a method often used in every scientific field to relay important information found‚ support new theories as they are developed and keep our society aware and up to date with the issues that affect us and what type of effect they have. From a psychological standpoint statistics provides each individual with the tools necessary to understand the work of psychologists before
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How could graphics and/or statistics be used to misrepresent data? Where have you seen this done? Statistics are of value to us all. As learned throughout the readings for this week‚ they are there to provide us vast amount of data related to health care‚ including why a drug may be indicated for a certain treatment (or the likelihood of it working); parameters for disease signs and symptoms; and even the prevalence of certain disease(s) within our areas to ensure competent care can be provided
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ADDITIONAL MATHEMATICS: PROJECT WORK 2013 “Statistics in our daily life.” CONTENTS Introduction Acknowledgement Part 1 Part 2 Part 3 Further exploration Conclusion Reflection INTRODUCTION I‚ along with my fellow classmates‚ had been given a task by our Additional Mathematics teacher‚ which was the Additional Project Work 2013. Statistics is the study of the collection‚ organization‚ analysis‚ interpretation and presentation of data. It
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Last name: First name: Student #: STA 304H1 F/1003H F SUMMER 2009‚ First Test‚ May 28 (20%) Duration: 50min. Allowed: hand-calculator‚ aid-sheet‚ one side‚ with theoretical formulas and definitions only. [25] 1) A marketing analyst is asked to study the buying habits of shoppers at a national chain store (e.g. Sears). Suppose there are 150 stores around the country. (a) Describe the population of interest. (b) Describe in short a realistic sampling procedure for obtaining a representative
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Question1: Frequency Distribution. Histograms‚ Cumulative Frequency and Ogives. 1) a) 799 b) 1000 c) 900+9992 = 949.5 d) Lower Class Boundary=1100-0.5 =1099.5 Upper Class Boundary=1199.5+0.5=1199.5 e) 100 f) 76 g) 62400×100=15.5 h) 600-699‚ the fourth class has the largest frequency of 76. i)14+46+58400 ×100=29.5% j) 48+22+6400 ×100=19.0% k) 4002=200 200 lie in the fifth class interval 700-799 ∴The median lies in this interval. =l+n2-cff×h =700+200-19468×99 =708.735 l)
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Term Random Variable Definition A variable that takes on different numerical values based on chance Term Discrete Random Variable Definition A random variable that can only assume a finite number of values or an infinite sequence of values such as 0‚1‚2‚3.... Term Continuous Random Variables Definition Random variables that can assume any vallue in an interval. Term Expected Value Definition The mean of a probability distribution. the average value when the experiment
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materials usually occurs with any process. True False 7. A cost variance is the difference between actual cost and standard cost. True False 8. A budget performance report that includes variances can have variances caused by both price differences and quantity differences. True False 9. A cost variance equals the sum of the quantity variance and the price variance. True False 10. When computing a price variance‚ the price is held constant. True False 11. Within the same
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CONFIDENTIAL CS/JAN 2012/QMT500 UNIVERSITI TEKNOLOGI MARA FINAL EXAMINATION COURSE COURSE CODE EXAMINATION TIME STATISTICS FOR ENGINEERING QMT500 JANUARY 2012 3 HOURS INSTRUCTIONS TO CANDIDATES 1. This question paper consists of five (5) questions. 2. Answer ALL questions in the Answer Booklet. Start each answer on a new page. Do not bring any material into the examination room unless permission is given by the invigilator. Please check to make sure that this examination pack
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Research and Statistics in Psychology Tracy Charles PSY/315 October 14‚ 2012 Jennifer Slothower Research and Statistics in Psychology Psychologist need to adhere to scientific research methods when doing a study “the scientific method requires systematic observation and a willingness to modify understanding based on these observations” (Cloninger et al.‚ 2008). This method involves careful observation and collection of data to rule out theories that are not valid. “Scientific
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