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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: 10

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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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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: 73

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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: 87

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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 - 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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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: 22

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

Title: Chapter 13: Determination of Sample Size: A Review of Statistical Theory Author: Wesley Thoene Last modified by: wthoene Created Date: 4/11/2005 8:30:03 PM

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

Date added: June 16, 2013 - Views: 4

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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: 8

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Sample Size and Power - Medical and Healthcare Web-based ...

Sample Size and Power Laura Lee Johnson, Ph.D. Statistician National Center for Complementary and Alternative Medicine [email protected] Tuesday, November 15, 2005

http://www.nihtraining.com/cc/ippcr/current/downloads/johnson111505bw.ppt

Date added: August 28, 2011 - Views: 235

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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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RESEARCH ETHICS - Boston University Medical Campus

Sample Size Determination Janice Weinberg, ScD Professor of Biostatistics ... SAMPLE SIZE: How many subjects are needed to assure a given probability of detecting a statistically significant effect of a given magnitude if one truly exists?

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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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: 5

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Sampling Technique & Sampling Size - University of Pittsburgh

Compute the minimal sample size required at a confidence limit of 95% and accepting a difference of up to 4% of the true population. Answer Problem 4 In previous studies, percentage of hypertensives among Diabetics was 70% and among non diabetics was 40% in a certain community.

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

Date added: September 7, 2011 - Views: 161

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Sampling and Sample Size Determination - University of Lethbridge

Sampling and Sample Size Determination Terms Sample Population Population element Census Why use a sample? Cost Speed Accuracy Destruction of test units Steps Definition of target population Selection of a sampling frame (list) Probability or Nonprobability sampling Sampling Unit Error ...

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

Sample Size Determination: Measures of Interest in Most Surveys Sample Mean, Examples include: Mean rating on an attitudes measurement scale Mean income, age Mean number of purchases, monthly expenditure Sample Proportion, ...

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 ...

Sample size determination in health studies. NTI Bulletin 2006,42/3&4, 55 - 62. Author: USER Created Date: 09/19/2010 20:24:15 Title: Slide 1 Last modified by:

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

Date added: February 6, 2013 - Views: 21

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Determining the Size of a Sample

Special Sample Size Determination Situations Sampling from small populations: Small population: sample exceeds 5% of total population size Finite multiplier: ...

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, sample size is unrelated to accuracy, so cost-benefit considerations must be used Sample Accuracy Sample accuracy: ...

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

Date added: February 2, 2012 - Views: 30

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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/200401/mgt2700a/Lectures/Sampling%20.ppt

Date added: November 28, 2013 - Views: 15

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Experimental design - University of Wisconsin–Madison

Experimental design and sample size determination Karl W Broman Department of Biostatistics Johns Hopkins University http://www.biostat.jhsph.edu/~kbroman Note This is a shortened version of a lecture which is part of a web-based course on “Enhancing Humane Science/Improving Animal Research ...

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

Date added: October 29, 2011 - Views: 94

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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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SAMPLING: Process of Selecting your Observations

SAMPLING: Process of Selecting your Observations Sample size determination for estimating Proportions (p): EXAMPLE: Projecting the percentage of people who would be voting for a particular candidate in a presidential election. In such cases, ...

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: 22

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Estimation/Confidence Intervals for Popn Mean

... Expert Guess (range/4) Target Precision Sample Size Determination Equate the CI precision to the target precision and solve for n. voilá Equate this to E. Precision can be specified relative to s. 100(1-a)% CI for m Sample Size Example Take home message: ...

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

Date added: June 30, 2012 - Views: 4

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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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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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Basic Business Statistics, 9th Edition - pearsoncmg.com

... Confidence interval for proportion Sample Size (n ) Determination for Finite Population Samples are Selected Without Replacement When estimating the mean When estimating the proportion Ethical Issues Confidence Interval (Reflects ...

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 - s, su

Practical Considerations in Sample Size Determination How to decide on the level of confidence desired The more confidence, the larger the sample size. Convention is 95% (z=1.96) The more important the decision, the more likely the manager will want more confidence.

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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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: 6

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Marketing Research - People Search Directory

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.ppt

Date added: June 26, 2013 - Views: 2

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

Indicators for Sample Size Determination Sample size is different for each MICS indicator. Must choose a key indicator, since only one sample size can be used in MICS. Recommendations for choosing key indicator: Choose from among main indicators of interest in your country.

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

using Microsoft Excel 3rd Edition Chapter 6 Confidence Interval Estimation Chapter Topics Estimation process Point estimates Interval estimates Confidence interval estimation for the mean ( known) Determining sample size Confidence interval estimation for the mean ( unknown) Confidence interval ...

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

Date added: May 5, 2013 - Views: 16

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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, 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

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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: 6

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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: 294

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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: 11

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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: 10

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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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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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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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Design of Engineering Experiments Part 2 - Contents

Sample Size Determination Text, Section 3-7, pg. 107 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://iiesl.utk.edu/Courses/IE340%20S07/Slides/part02.ppt

Date added: September 16, 2012 - Views: 17

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Sample Size and Power - Medical and Healthcare Web-based ...

Sample Size and Power Laura Lee Johnson, Ph.D. Statistician National Center for Complementary and Alternative Medicine [email protected] Tuesday, November 13, 2007

http://www.nihtraining.com/cc/ippcr/current/downloads/BWLLJ111307.ppt

Date added: November 8, 2011 - Views: 52

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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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Sample Size Determination - McMaster Faculty of Health Sciences

Title: Sample Size Determination Author: value Last modified by: kliej Created Date: 11/13/2006 3:28:20 AM Document presentation format: On-screen Show

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

Date added: November 8, 2011 - Views: 91

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Chapter 8

Confidence Intervals Chapter Outline 8.1 z-Based Confidence Intervals for a Population Mean: σ Known 8.2 t-Based Confidence Intervals for a Population Mean: σ Unknown 8.3 Sample Size Determination 8.4 Confidence Intervals for a Population Proportion 8.5 A Comparison of Confidence Intervals and ...

http://www.occc.edu/machiorlatti/Business%20Statistics/Lecture%20PowerPoint%20Slides/Chap008.ppt

Date added: December 22, 2013 - Views: 3

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Outline - University of South Florida

This concept for determination of sample size is usually referred to as power analysis for sample size determination. Power Analysis For determination of sample size based on power analysis, the investigator is required to specify the following information.

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

Date added: May 3, 2013 - Views: 11

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The t Tests - University of New Mexico

Next week: Read Russ Lenth’s paper on effective sample-size determination http://www.stat.uiowa.edu/techrep/tr303.pdf The t Test for Dependent Samples Repeated-Measures Design When you have two sets of scores from the same person in your sample, ...

http://www.unm.edu/~marley/statppt/fall06/001/day12.ppt

Date added: October 23, 2013 - Views: 5