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Sample size determination - University of Pretoria

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Sample size determination - University of Pretoria

Statistical planning and Sample size determination Planning Which variables will I collect and how will they be measured? What types of data do they represent?

http://web.up.ac.za/sitefiles/15_samplesize.ppt

Date added: February 5, 2013 - Views: 12

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Determination of Sample Size

Determination of Sample Size DR R.P. NERURKAR Associate Professor Dept. of Pharmacology T.N. MEDICAL COLLEGE B.Y.L NAIR HOSPITAL, MUMBAI AYUSH Workshop

http://xa.yimg.com/kq/groups/17458078/332206535/name/Dr+Nerurkar+-+Determination+of+Sample+Size.ppt

Date added: January 28, 2012 - Views: 74

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Sample Size Determination - North Carolina State University

Title: Sample Size Determination Author: Tom Reiland Last modified by: reiland Created Date: 12/2/1996 11:58:40 AM Document presentation format: On-screen Show (4:3)

http://www.stat.ncsu.edu/people/reiland/courses/st350/SAMPSIZE_p_sp08.ppt

Date added: October 25, 2011 - Views: 13

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Experimental design,basic statistics, andsample size ...

Experimental design, basic statistics, and sample size determination Karl W Broman Department of Biostatistics Johns Hopkins Bloomberg School of Public Health

http://www.pitt.edu/~super7/32011-33001/32881-32901.ppt

Date added: September 28, 2011 - Views: 88

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Sample Size Determination - North Carolina State University

Title: Sample Size Determination Author: Tom Reiland Last modified by: Tom Reiland Created Date: 12/2/1996 11:58:40 AM Document presentation format

http://www.stat.ncsu.edu/people/reiland/courses/st350/SAMPSIZE_mu_f09.ppt

Date added: May 20, 2013 - Views: 6

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Sample Size Determination - West Virginia University

Sample Size Determination Everything You Ever Wanted to Know About Sampling Distributions--And More! Sampling Distribution A frequency distribution of all the means obtained from all the samples of a given size Example: $$ spent on CD’s at Best Buy Daffy $34.00 Donald $72.00 Sylvester $36.00 ...

http://www.be.wvu.edu/divmim/mktg/france/graduateresearch/sampling/samplesizedetermination.ppt

Date added: December 7, 2011 - Views: 24

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Clinical Trials A short course - Chalmers

Statistical Methods in Clinical Trials Sample Size Determination Ziad Taib Biostatistics AstraZeneca March 12, 2012 * * * * 88 134 256 844 2152 0.9 65 100 191 631 1607 0.8 51 79 150 496 1264 0.7 32 49 94 309 787 0.5 2.00 1.75 1.50 1.25 1.15 power The number of events needed for a certain power ...

http://www.math.chalmers.se/Stat/Grundutb/GU/MSA620/S12/Sample2012.ppt

Date added: May 2, 2013 - Views: 11

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Sample Size Determination - Division of Preventive Medicine

Module 28 Sample Size Determination This module explores the process of estimating the sample size required for detecting differences of a specified magnitude for three common circumstances.

http://statcourse.dopm.uab.edu/PPT/MODULE%2028%20Sample%20Size%20Determination%2019%20July%2005.ppt

Date added: May 21, 2013 - Views: 8

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RESEARCH ETHICS - Boston University Medical Campus

Sample Size Determination Janice Weinberg, ScD Professor of Biostatistics Boston University School of Public Health * * * * * * * * * * * * * * * * * * * * * * * * * Outline Why does this matter?

http://www.bumc.bu.edu/facdev-medicine/files/2012/03/Sample-Size-Determination-03202012.ppt

Date added: May 3, 2013 - Views: 10

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Chapter 13: Determination of Sample Size: A Review of ...

Determination of Sample Size: A Review of Statistical Theory Chapter 13 Sample v. Population Inferential Descriptive Sample statistics Population parameters Tables Frequency distribution Percentage distribution Probability Proportion Measures of Central Tendency Mean Median Mode Measures of ...

http://faculty.rio.edu/wthoene/MKT%20Classes2/MKT%20Research/Determinaton%20of%20Sample%20Size.ppt

Date added: June 16, 2013 - Views: 6

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Sample size determination - Raywat Deonandan

Sample size determination Nick Barrowman, PhD Senior Statistician Clinical Research Unit, CHEO Research Institute March 29, 2010 Outline Example: lowering blood pressure Introduction to some statistical issues in sample size determination Two simple approximate formulas Descriptions of sample ...

http://classes.deonandan.com/hss4303/2010/mar29samplesize.ppt

Date added: June 7, 2013 - Views: 15

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Issues in Sample Size Determination - Virginia Institute for ...

Issues in sample size determination Sample size formulas depend on Study design Outcome measure Dichotomous Ordered Continuous Time to event (survival)

http://www.vipbg.vcu.edu/psy691/CC12McClish.ppt

Date added: December 20, 2013 - Views: 7

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Sampling Technique & Sampling Size - University of Pittsburgh

... smallest unit from which sample can be selected Sampling frame List of all the sampling units from which sample is drawn Sampling scheme Method of selecting sampling units from sampling frame Types of ... Compute the minimal sample size required at a confidence limit of 95% and ...

http://www.pitt.edu/~super4/33011-34001/33841.ppt

Date added: September 7, 2011 - Views: 168

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Sampling and Sample Size Determination - University of Lethbridge

Title: Sampling and Sample Size Determination Author: Sandy Cahoon Last modified by: Sandy Cahoon Created Date: 3/15/2004 9:20:52 PM Document presentation format

http://classes.uleth.ca/200501/mgt2700b/Lectures/Sampling%20and%20Sample%20Size%20Determination.ppt

Date added: April 27, 2014 - Views: 1

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No Slide Title

Chapter XII Sampling: Final and Initial Sample Size Determination Chapter Outline 1) Overview 2) Definitions and Symbols 3) The Sampling Distribution 4) Statistical approaches to Determining Sample Size 5) Confidence Intervals i.

http://directory.umm.ac.id/Slide_Kuliah/PPT/RM_Malhotra/chapter12.ppt

Date added: August 2, 2013 - Views: 5

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MGM403 Marketing Research - Mississippi State University

Chapter 17 Sample Size Determination *Adapted from Andrei Strijnev Basic Considerations in Determining Sample Size Precision – the degree of error in a study, or the size of the estimating interval How precise should the estimate be?

http://misweb.cbi.msstate.edu/~COBI/faculty/users/mrb1/files/autoweb/mkt4533website/SampleSize.ppt

Date added: September 3, 2013 - Views: 3

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SAMPLE SIZE ESTIMATION - E-Library for the Post-graduate ...

Practical issues in Determining Sample Sizes. Importance of the Research Issue: If the results of the survey research are very critical, then the sample size should be increased.

http://pglibrary-publichealth.wikispaces.com/file/view/sample+size+estimation.pptx

Date added: February 6, 2013 - Views: 23

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Determining the Size of a Sample

Determining the Size of a Sample Sample Accuracy Sample accuracy: refers to how close a random sample’s statistic is to the true population’s value it represents Important points: Sample size is not related to representativeness Sample size is related to accuracy Sample Size and Accuracy ...

http://faculty.kutztown.edu/jwilliam/pwr_pt_slides/marketing_research/burns05_ppt13.ppt

Date added: September 16, 2013 - Views: 7

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bbch13.ppt.ppt - Homepages at WMU

Special Sample Size Determination Situations Sample Size Using Nonprobability Sampling When using nonprobability sampling, ... The Confidence Interval Method of Determining Sample Size The relationship between sample size and sample error: ...

http://homepages.wmich.edu/~lindquis/marketing%20research%20ppt/bbch13.ppt.ppt

Date added: February 2, 2012 - Views: 32

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Experimental design - University of Wisconsin–Madison

Experimental design and sample size determination Karl W Broman Department of Biostatistics Johns Hopkins ... Courier New Times Symbol humanescience_rev Microsoft Equation Microsoft Excel Chart Experimental design and sample size determination Note Experimental design Basic ...

http://www.biostat.wisc.edu/%7Ekbroman/presentations/acuc.ppt

Date added: October 29, 2011 - Views: 101

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SAMPLING: Process of Selecting your Observations

n = Z2 p(1-p) / E2 SAMPLING: Process of Selecting your Observations Sample size determination for Estimating Proportions: EXAMPLE: Suppose you are to project the percentage of potential voters who would be expected to vote for the Republican candidate in the upcoming presidential election ...

http://my.ilstu.edu/~mhemmas/LDR%20280/LDR%20280%20Lecture%20Slides/7.%20Sampling%20&%20Sample%20Size%20Determination-LDR%20280.ppt

Date added: June 28, 2012 - Views: 25

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PowerPoint Presentation

Sample size determination for estimation of the accuracy of two conditionally independent diagnostic tests Marios Georgiadis, Faculty of Veterinary Medicine,

http://www.epi.ucdavis.edu/diagnostictests/files/ML-HW-SampSiz.ppt

Date added: September 14, 2011 - Views: 17

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Marketing Research - Winthrop University

Sampling Fundamentals 2 Sampling Process Identify Target Population Select Sampling Procedure Determine Sampling Frame Determine Sample Size Determining Sample Size – Ad Hoc Methods Rule of thumb Each group should have at least 100 respondents Each sub-group should have 20 – 50 respondents ...

http://faculty.winthrop.edu/patwardhanh/mkt.482/powerpoint.slides/chapter11-sample-size-adapted.ppt

Date added: May 14, 2013 - Views: 5

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No Slide Title

Title: No Slide Title Subject: Ch12 Sample Size Determination Author: Charles Pflanz revised by B. R. Oates Last modified by: Barbara R. Oates Created Date

http://homepages.stmartin.edu/fac_staff/ppatterson/Principles%20of%20Marketing/chapter11.ppt

Date added: May 2, 2012 - Views: 5

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Basic Business Statistics, 9th Edition - pearsoncmg.com

... Total Discussed Confidence Interval Estimation for Total Difference in the Population Addressed Estimation and Sample Size Determination for Finite Population Addressed Confidence Interval Estimation and Ethical Issues Basic Business Statistics ...

http://myphliputil.pearsoncmg.com/student/bp_berenson_bbs_9/chap08.ppt

Date added: November 22, 2013 - Views: 2

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Determining the Size of a Sample - دانشگاه علوم ...

In the name of God Determining the Size of a Sample Dr Mohammad Hossein Fallahzade Sample Accuracy Sample accuracy: refers to how close a random sample’s statistic is to the true population’s value it represents Important points: Sample size is not related to representativeness Sample size ...

http://www.ssu.ac.ir/fileadmin/templates/fa/Moavenatha/Moavenate-Amozeshi/Upload_MBAmozeshi/EDc/kargah/new.sample_size_for_conference.ppt

Date added: September 24, 2011 - Views: 9

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Estimation/Confidence Intervals for Popn Mean

One Sample Mean Inference (Chapter 5) In Unit 2 we will discuss: How to estimate the mean from a normal distribution and compute a 95% confidence interval for the true unknown population mean.

http://www.math.ttu.edu/~atrindad/stat5302-5303/Lectures/U2.1-OneSampleMeanCI.ppt

Date added: June 30, 2012 - Views: 4

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irc6a - University of Nevada, Las Vegas

The Normal Probability Distribution Sample size determination – adjusting for population size Make an adjustment in the sample size if the sample size is more than 5 percent of the size of the total population.

http://faculty.unlv.edu/npomirleanu/Normal%20Distribution-posted.ppt

Date added: November 14, 2011 - Views: 19

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Statistics for Business and Economics, 6/e

Sample Size Determination Sample Size Determination Sample Size Determination The sample and population proportions, and P, are generally not known (since no sample has been taken yet) P(1 – P) = 0.25 generates the largest possible margin of error ...

http://home.sandiego.edu/~kdoshi/QBA%20Powerpoints/chap09.ppt

Date added: November 29, 2013 - Views: 8

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GUIDELINES ON SAMPLING OF YOUTH With Emphasis on Those in ...

Purpose is to reduce listing workload to a manageable size. MICS Sampling Option 3 USE NEW SAMPLE WITHOUT HOUSEHOLD LISTING OPERATION ... Sample size determination Stratification and sample allocation Number of Primary Sampling Units and cluster sizes Use of existing sample or new sample A ...

http://www.childinfo.org/files/Sampling.ppt

Date added: September 7, 2011 - Views: 27

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Statistics for Managers Using Microsoft Excel, 3/e

Example in excel spreadsheet Determining Sample Size for Proportion Out of a population of 1,000, ... Confidence interval for proportion Sample Size Determination for Finite Population Samples are selected without replacement When estimating the mean When estimating the proportion ...

http://myphliputil.pearsoncmg.com/student/levine4/chap06.ppt

Date added: May 5, 2013 - Views: 16

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Chapter Ten

Chapter Twelve Sampling: Sample Size Determination Objectives Definitions and Symbols The Sampling Distribution Statistical Approaches to Determining Sample Size Confidence Intervals Sample Size Determination: Means Sample Size Determination: Proportions Multiple Characteristics and Parameters ...

http://www.cob.unt.edu/slides/Paswan/Mktg5250/AKP5250Ch12.PPT

Date added: September 18, 2013 - Views: 1

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Statistics for Business and Economics, 7/e

Sample Size Determination Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall (continued) Now solve for n to get Ch. 8-* For the Mean Large Populations Sample Size Determination To determine the required sample size for the mean, ...

http://www.anvari.net/21_BS/chap08.ppt

Date added: October 6, 2013 - Views: 1

ppt
No Slide Title

Title: No Slide Title Subject: Ch12 Sample Size Determination Author: Charles Pflanz Last modified by: TL User Created Date: 1/20/2000 5:25:32 PM Document presentation format

http://higheredbcs.wiley.com/legacy/college/mcdaniel/0470003626/ppt/ch13.ppt

Date added: March 19, 2012 - Views: 9

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MARKETING RESEARCH - Husson University

MARKETING RESEARCH CHAPTERS 11 Questionnaire and Form Design 12 Sampling: Design and Procedures 13 Sampling: Final and Initial Sample Size Determination

http://cookc.husson.edu/MARKETING%20RESEARCH%20Chapters11-13.ppt

Date added: May 22, 2014 - Views: 7

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Audit Sampling: Concepts and Techniques - University of Delaware

PPS Sampling Determination of Sample Size PBV = population book value RF = reliability factor (Table 9-14) TM = tolerable misstatement EM = expected misstatement EF = expansion factor (Table 9-15) ...

http://www.buec.udel.edu/jenkinsd/Powerpoint/Chp09.ppt

Date added: September 7, 2011 - Views: 302

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Design of Engineering Experiments Part 2 - Contents

Sample Size Determination Text, Section 3-7, pg. 101 FAQ in designed experiments Answer depends on lots of things; including what type of experiment is being contemplated, how it will be conducted, resources, ...

http://www.stat.wvu.edu/~ghobbs/stat313/part02.ppt

Date added: June 10, 2012 - Views: 12

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Experimental design - University of Wisconsin–Madison

Experimental design, basic statistics, and sample size determination Karl W Broman Department of Biostatistics Johns Hopkins Bloomberg School of Public Health

http://www.biostat.wisc.edu/~kbroman/teaching/misc/humanesci.ppt

Date added: May 7, 2013 - Views: 16

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Marketing Research: The Impact of the Internet - Wiley: Home

Sample Size Determination To learn the financial and statistical issues in the determination of sample size To discover methods for determining sample size To gain an appreciation of a normal distribution To understand population, sample, and sampling distributions.

http://higheredbcs.wiley.com/legacy/college/mcdaniel/0471455199/ppt/ch13.ppt

Date added: March 19, 2012 - Views: 12

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No Slide Title

Survey Sample Size MKTG 3342 Fall 2008 Professor Edward Fox Survey Sample Size MKTG 3342 Fall 2008 Professor Edward Fox Sample Size Determination Convenience – Say … about 100.

http://efox.cox.smu.edu/mktg3342/lec10-sampsize.ppt

Date added: September 14, 2011 - Views: 14

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Business Research Methods William G. Zikmund

Business Research Methods William G. Zikmund Chapter 17: Determination of Sample Size What does Statistics Mean? Descriptive statistics Number of people Trends in employment Data Inferential statistics Make an inference about a population from a sample Population Parameter Versus Sample ...

http://www.swlearning.com/management/zikmund/bus_research/powerpoint/ch17.ppt

Date added: October 26, 2011 - Views: 15

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Design of Engineering Experiments Part 2 - Contents

Sample size determination Portland Cement Formulation (Table 2-1, pp. 22) Graphical View of the Data Dot Diagram, Fig. 2-1, ... Contents Author: Dr. Xueping Li Last modified by: Xueping Li Created Date: 6/14/2000 10:43:10 PM Document presentation format:

http://iiesl.utk.edu/Courses/IE340%20S07/Slides/part02.ppt

Date added: September 16, 2012 - Views: 18

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Sample Size Determination - McMaster Faculty of Health Sciences

Sample Size Determination Inappropriate Wording or Reporting “A previous study in this area recruited 150 subjects & found highly sign. Results” Previous study may have been lucky “Sample sizes are not provided because there is no prior information on which to base them” Do a pilot study ...

http://www.fhs.mcmaster.ca/surgery/documents/SampleSizeDeterminationof19Nov2008byDr.N.Strumas.ppt

Date added: November 8, 2011 - Views: 93

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SAMPLING DISTRIBUTIONS - Hacettepe Üniversitesi

SAMPLE SIZE DETERMINATION Reasons for Sampling Samples can be studied more quickly than populations. A study of a sample is less expensive than studying an entire population, because smaller number of items or subjects are examined.

http://www.biyoistatistik.hacettepe.edu.tr/lisans/phaseIII/Determination_of_sample_size.pps

Date added: June 13, 2012 - Views: 8

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Sample Size Estimation - Mahidol University

Introduction to Sample Size Determination and Power Analysis for Clinical Trials. Controlled Clinical Trials 1981; 2: 93-113 ... (0-10) Example 9 Sample size if parametric test (2-sample t-test) is used Sample size if Non-parametric (Mann-Whitney) test is used (VAS pain ...

http://ec.mahidol.ac.th/ref9/Q/Slide_Sample_Size_Estimation(Dr.Julaluk2009).ppt

Date added: September 15, 2012 - Views: 11

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Chapter 9

Sample Size Determination for a Variable To find the sample size for a variable: ... Factors Affecting Confidence Interval Estimates The factors that determine the width of a confidence interval are: 1.The sample size, ...

http://www.unf.edu/~jgleaton/STA2023Ch09.ppt

Date added: September 14, 2011 - Views: 63

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Outline - University of South Florida

Outline Basic Concepts Sample Size Calculation Precision analysis Power analysis ... Therefore, the precision analysis for sample size determination is to consider the maximum half width of the confidence interval of the unknown parameter that one is willing to accept. The maximum ...

http://personal.health.usf.edu/ywu/Power_lecturenotes.ppt

Date added: May 3, 2013 - Views: 13

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Independent Sample Tests lecture at online course on statistics

Normal distribution or large enough sample size to assume normality due to the central limit theorem. ... determination. Note: Hct = % of volume of a blood sample occupied by cells. ... Independent Sample Tests lecture at online course on statistics Last modified by:

http://gunston.gmu.edu/healthscience/597/independentSampleTests.PPT

Date added: October 6, 2011 - Views: 42

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Attribute Control Charts - College of Business | Iowa State ...

Attribute Control Charts Binomial Count Charts P Chart - Fraction defective data, subgroup size could vary or stay constant. NP Chart - Number of defective data, subgroup size has to be constant

http://www.bus.iastate.edu/rruben/pom521/day%208.ppt

Date added: October 23, 2013 - Views: 3

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Chapter 8

... σ Unknown 8.3 Sample Size Determination If σ is known, then a sample of size so that x is within E units of , with 100(1- )% confidence Sample Size Determination (t) If σ is unknown and is estimated from s, ...

http://highered.mheducation.com/sites/dl/free/007340182x/895983/Chap008.ppt

Date added: August 9, 2014 - Views: 1