Licensed to: iChapters User Statistics for Management and Economics Abbreviated, Ninth Edition Gerald Keller VP/Editorial Director: Jack W. Calhoun Publisher: Joe Sabatino Senior Acquisitions Editor: Charles McCormick, Jr. Developmental Editor: Elizabeth Lowry Editorial Assistant: Nora Heink Senior Marketing Communications Manager: Libby Shipp Marketing Manager: Adam Marsh Content Project Manager: Jacquelyn K Featherly Media Editor: Chris Valentine Manufacturing Buyer: Miranda Klapper Production
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hypotheses in a testing situation when the parameter in question is a population mean µ. 2. Explain in nontechnical language the meaning of the P-value when you are given the numerical value of P for a test. 3. Calculate the one-sample z-statistic and the P-value for both one-sided and two-sided tests about the mean µ of a Normal population. 4. Assess statistical significance at standard levels α by comparing P to α. 5. Recognize that significance testing does not measure the size
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ETX2121 Data Analysis in Business Sample Exam 3 Solutions Question 1 a) ˆ i) X = 196.6 ; T = NX = 500 × 196.6 = $98 300 ii) n = 20; s = 91.480; 1 − α = 0.95 ⇒ α = 0.05 ⇒ α 2 = 0.025 , t α 2,n −1 = t 0.025,19 = 2.093 Since n/N = 20/500 = 0.04 < 0.05, not required to use the fpc. 95% confidence interval estimate of the total accounts receivable ⎛ s ⎞ N ⎜ X ± tα 2 ,n −1 ⎟ ⎜ ⎟ n⎠ ⎝ ⎛ ⎛ 91.480 ⎞ ⎞ = 500⎜196.6 ± 2.093⎜ ⎟⎟ ⎜ ⎟⎟ ⎜ ⎝ 20 ⎠ ⎠ ⎝ = 500(196.6 ± (2.093 × 20.4556)) = 500(196.6 ± 42.8136)
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POPULATION MEAN STATISTICS IN PRACTICE: JOHN MORRELL & COMPANY 9.1 DEVELOPING NULL AND ALTERNATIVE HYPOTHESES The Alternative Hypothesis as a Research Hypothesis The Null Hypothesis as an Assumption to Be Challenged Summary of Forms for Null and Alternative Hypotheses 9.2 TYPE I AND TYPE II ERRORS 9.3 POPULATION MEAN: σ KNOWN One-Tailed Test Two-Tailed Test Summary and Practical Advice Relationship Between Interval Estimation and Hypothesis Testing 349 Statistics in Practice STATISTICS in PRACTICE
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&r' 1 || i I Test Anxiety Applied Research, Assessment, and Treatment Interventions i I : fet 2nd Edition I « MARTY SAPP m: I H 1 ttTttTtttttrrtiTTITTtrrtttttttttTtrttiTTtrrttTtttTtTTTtttttiTttt TEST ANXIETY Applied Research, Assessment, and Treatment Interventions 2nd Edition Marty Sapp University Press of America, Inc. Lanham • New York • Oxford Copyright © 1999 by University Press of America,® Inc. 4720 Boston Way Lanham, Maryland
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Final Exam Review Questions You should work each of the following on your own, then review the solutions guide. DO NOT look at the solutions guide first. 1. Determine whether the following are nominal, ordinal, interval, and ratio. a. Daily temperatures in Ripon, WI b. Test scores in statistics class Solution: (a) would be interval as there is no zero while (b) would be ratio as there is a zero. 2. The following numbers represent the weights in pounds of six 7-year
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Statistics and Computing Series Editors: J. Chambers D. Hand W. H¨ rdle a Statistics and Computing Brusco/Stahl: Branch and Bound Applications in Combinatorial Data Analysis Chambers: Software for Data Analysis: Programming with R Dalgaard: Introductory Statistics with R, 2nd ed. Gentle: Elements of Computational Statistics Gentle: Numerical Linear Algebra for Applications in Statistics Gentle: Random Number Generation and Monte Carlo Methods, 2nd ed. H¨ rdle/Klinke/Turlach: XploRe: An Interactive
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Hypothesis Testing: One-Sample Tests A Connection Between Confidence Interval Estimation and Hypothesis Testing Can You Ever Know the Population Standard Deviation? USING STATISTICS @ Oxford Cereals, Part II Fundamentals of Hypothesis-Testing Methodology The Null and Alternative Hypotheses The Critical Value of the Test Statistic Regions of Rejection and Nonrejection Risks in Decision Making Using Hypothesis Testing Hypothesis Testing Using the Critical Value Approach Hypothesis Testing Using the
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Part 1. Basic Concepts of Statistics Basic Concepts of Statistics • Every four years, we suffer through an affliction, the presidential election. • Months before the election, public media will inform us that a poll conducted by the opinion research shows that a candidate gains support of more than 50 percent of voters. 1 2 Basic Concepts of Statistics • However, the high percent of support will be with a margin of error of plus or minus 3%. • What is meant by the term margin of error
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Variables in our modern world effecting University Students’ academic success Abstract This research investigates the factors and variables that affect students’ academic results. This research paper focuses on variables which include hours of work, gender, high School academic results, hours of study and what relationship it has with our dependent variable which is the GPA. We aim to discover what relationship our variables hold with the dependent variable; if it is significant or in significant
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