Presentation Summary : Sample size and study design Brian Healy, PhD Comments from last time We did not cover confounding Too much in one class/Not enough examples/Superficial level I ...
Source : http://hedwig.mgh.harvard.edu/biostatistics/sites/default/files/public/bhealy_tutorials/Session4b.ppt
Presentation Summary : Sample Size How many replications, n, do I need? What size effects do you want to detect? We will focus on detecting effects of a pre-specified magnitude
Source : http://www.stat.sc.edu/~grego/courses/stat506/Lecture.notes/SampleSize.ppt
Presentation Summary : Introduction to sample size and power calculations How much chance do we have to reject the null hypothesis when the alternative is in fact true?
Source : http://www.stanford.edu/%7Ekcobb/hrp259/lecture11.ppt
Presentation Summary : Chapter 13 Determining the Size of a Sample Sample Size AXIOMS There is only one method of determining sample size that allows the researcher to PREDETERMINE the ...
Source : http://homepages.wmich.edu/~lindquis/marketing%20research%20ppt/bbch13.ppt.ppt
Presentation Summary : Starting at that point, take every Kth name on the list until the desired sample size is reached. 5. Start at some random place in the population list.
Source : http://www83.homepage.villanova.edu/richard.jacobs/EDU%208603/lessons/sampling.ppt
Presentation Summary : Full population. Samplepopulation = The sample population . IS. the full population; this is . ideal. Full population. Sample population. The sample population is
Source : http://www.colby-sawyer.edu/assets/ppt/samplesize_Ql_1.ppt
Presentation Summary : Sample Proportions and Sample Means CH 18 The SAT -Verbal scores of a sample of 300 students at a particular university had a mean of 592 and standard deviation of 73.
Source : http://www.albany.edu/~reinhold/m108/C18.ppt
Presentation Summary : Calculating sample size for a case-control study Statistical Power Statistical power is the probability of finding an effect if it’s real. Factors Affecting Power 1.
Source : http://www.stanford.edu/~kcobb/hrp261/lecture8.ppt
Presentation Summary : Compute the minimal sample size required at a confidence limit of 95% and accepting a difference of up to 4% of the true population.
Source : http://www.pitt.edu/~super4/33011-34001/33841.ppt
Presentation Summary : Sample Size and Power Laura Lee Johnson, Ph.D. Statistician National Center for Complementary and Alternative Medicine email@example.com Tuesday, November 15, 2005
Source : http://www.nihtraining.com/cc/ippcr/current/downloads/johnson111505bw.ppt
Presentation Summary : Effect Size and Power Effect Size and Power Two things mentioned previously: P-values are heavily influenced by sample size (n) Statistics Commandment #1: P-values ...
Source : http://www.personal.kent.edu/~mtmoore1/Quant2EffectSizeandPower.ppt
Presentation Summary : More General Comments. A well-written sample size estimation section in a grant can convince the reviewers that you know what you’re doing. A poorly-written sample ...
Source : http://people.musc.edu/~elg26/teaching/statcomputing.2013/Lectures/Lecture25.Samplesize/Sample%20Size%20&%20Power%20Estimation.pptx
Presentation Summary : Sample Size to Compare Percentages A study to compare percentages of outcomes from different groups (incidence, conversion rate, cure rate, mortality rate, ...
Source : http://web.kku.ac.th/animal/files/Sample_Size_Calculation.ppt
Presentation Summary : PPS focuses on overstatements. PPS Sampling Determination of Sample Size PBV = population book value RF = reliability factor (Table 9-14) ...
Source : http://www.buec.udel.edu/jenkinsd/Powerpoint/Chp09.ppt
Presentation Summary : Experimental design, basic statistics, and sample size determination Karl W Broman Department of Biostatistics Johns Hopkins Bloomberg School of Public Health
Source : http://www.pitt.edu/~super7/32011-33001/32881-32901.ppt
Presentation Summary : 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)
Source : http://www.stat.ncsu.edu/people/reiland/courses/st350/SAMPSIZE_p_sp08.ppt
Presentation Summary : How Big a SampleDo You Need? Small sample size (less than the optimum sample size) – May fail to detect a clinically important difference, – or
Source : http://pglibrary-publichealth.wikispaces.com/file/view/sample+size+estimation.pptx
Presentation Summary : Effect of sample size Effect of the effect Various effects Desired power sample size Stringency of statistical test sample size Measurement variability ...
Source : http://www.biostat.wisc.edu/%7Ekbroman/presentations/acuc.ppt
Presentation Summary : Title: Sample Size and Power Calculations Author: Sergio Bautista Last modified by: Mead Created Date: 1/19/2010 12:30:56 PM Document presentation format
Source : http://cega.berkeley.edu/assets/cega_events/34/Sample_Size_Power.ppt
Presentation Summary : Title: Sample Size Determination Author: Tom Reiland Last modified by: Tom Reiland Created Date: 12/2/1996 11:58:40 AM Document presentation format
Source : http://www.stat.ncsu.edu/people/reiland/courses/st350/SAMPSIZE_mu_f09.ppt
Presentation Summary : Primary goals CRF’s Sample size Randomization Ethics Reporting Guidelines Primary goals Can your goals be met with the design you picked?
Source : http://www.secicstats.com/Secic%20-%20Is%20your%20study%20statistically%20sound.ppt
Presentation Summary : ... Illustration of Stratification Types of Statistical Sampling Plans Dual Purpose Test Allowance for Sampling Risk Sample Size Requirements of Audit ...
Source : http://www.wou.edu/~beebej/BA%20451/Chap009.ppt
Presentation Summary : Power and Sample Size. Statistical studies (surveys, experiments, observational studies, etc.) are always better when they are carefullyplanned.
Source : http://yeditepetip.files.wordpress.com/2014/04/sample-size-and-power-calculation.pptx
Presentation Summary : In many practical situations, a sample size of 30 [population needs to be what I call well behaved – sort of mounded but may be shewed] ...
Source : http://wweb.uta.edu/insyopma/baker/STATISTICS/Keller7/Keller%20PP%20slides-7/Chapter09.ppt