Power of statistical testsdoi:10.1080/17457300.2014.893709ShrikantDepartmentI.DepartmentBangdiwalaDepartmentInformaworldInternational Journal of Injury Control & Safety Promotion
Calculations of the power of statistical tests are important in planning research studies (including meta-analyses) and in interpreting situations in which a result has not proven to be statistically significant. The authors describe procedures to compute statistical power of fixed- and random-effects ...
POWER OF STATISTICAL TESTS TO SUPPORT OR REFUTE THE PRESENCE OF MULTIPLE SPECIES OF THE SAME GENUS WHEN SAMPLE SIZES ARE SMALLBROWNE, Ian D
G*Power is a free power analysis program for a variety of statistical tests. We present extensions and improvements of the version introduced by Faul, Erdfelder, Lang, and Buchner (2007) in the domain of correlation and regression analyses. In the new version, we have added procedures to ana...
,thenewversion,G*Power3.1,nowincludesstatisticalpoweranalysesforsixcorrelationandnineregressiontestproblems,assummarizedinTable1.AsusualinG*Power3,fivetypesofpoweranalysisareavailableforeachofthenewlyavailabletests(formorethoroughdiscussionsofthesetypesofpoweranalyses,seeErdfelder,Faul,Buchner,&Cüpper,inpress;Faul...
Cohen J. Statistical power analysis for the behavioral sciences. Academic; 2013. Meng X-L, Rosenthal R, Rubin DB. Comparing correlated correlation coefficients. Psychol Bull. 1992;111(1):172. Article Google Scholar Koo TK, Li MY. A Guideline of selecting and reporting Intraclass correlation ...
samples are standardized and compared with a standard normal distribution. This is equivalent to setting the mean and variance of the reference distribution equal to the sample estimates, and it is known that using the sample to modify the null hypothesis reduces the power of a test. Correcting ...
The test statistic is W, defined as the smaller of W+ and W- which are the sums of the positive and negative ranks of the difference scores, respectively. 简而言之:Sign test看的是出现正号和负号的个数,但Wilcoxon Signed Rank Test 会将正号的rank相加起来,得到W+,符号的rank相加起来,得到W-。
Our main result is that median works well as a test statistic with network traffic data, which we prove by conducting a power study with data collected from a live network. 展开 关键词: Monte Carlo simulation Statistical data analysis Data mining Goodness-of-fit testing Network traffic analysis...
As an aside, an analysis of covariance (ANCOVA) model includescovariatesthat account for some of the within-group variability, decreasing the unexplained variance. By shrinking the denominator, ANCOVA can increase statistical power relative to ANOVA. For more information, read my post aboutUnderstanding...