# power analysis

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## analysis

[ah-nal´ĭ-sis] (pl. anal´yses)
separation into component parts.
activity analysis the breaking down of an activity into its smallest components for the purpose of assessment.
bivariate analysis statistical procedures that involve the comparison of summary values from two groups on the same variable or of two variables within a group.
blood gas analysis see blood gas analysis.
chromosome analysis see chromosome.
concept analysis examination of the attributes of a concept as it occurs in ordinary usage in order to identify the meanings attached to the concept.
content analysis a systematic procedure for the quantification and objective examination of qualitative data, such as written or oral messages, by the classification and evaluation of terms, themes, or ideas; for example, the measurement of frequency, order, or intensity of occurrence of the words, phrases, or sentences in a communication in order to determine their meaning or effect.
correlational analysis a statistical procedure to determine the direction of a relationship (positive or negative correlation) between two variables and the strength of the relationship (ranging from perfect correlation through no correlation to perfect inverse correlation and expressed by the absolute value of the correlation coefficient).
analysis of covariance (ANCOVA) a variation of analysis of variance that adjusts for confounding by continuous variables.
data analysis the reduction and organization of a body of data to produce results that can be interpreted by the researcher; a variety of quantitative and qualitative methods may be used, depending upon the nature of the data to be analyzed and the design of the study.
ego analysis in psychoanalytic treatment, the analysis of the strengths and weaknesses of the ego, especially its defense mechanisms against unacceptable unconscious impulses.
gait analysis see gait analysis.
gastric analysis see gastric analysis.
multiple-locus variable number of tandem repeat analysis (MLVA) a laboratory tool designed to recognize tandem repeats and other qualities in the genome of an individual to provide a high resolution DNA fingerprint for the purpose of identification.
multivariate analysis statistical techniques used to examine more than two variables at the same time.
power analysis a statistical procedure that is used to determine the number of required subjects in a study in order to show a significant difference at a predetermined level of significance and size of effect; it is also used to determine the power of a test from the sample size, size of effect, and level of significance in order to determine the risk of Type II error when the null hypothesis is accepted.
qualitative analysis the determination of the nature of the constituents of a compound or a mixture of compounds.
quantitative analysis determination of the proportionate quantities of the constituents of a compound or mixture.
SNP analysis analysis of single nucleotide polymorphisms to assess artificially produced genetic modifications or identify different strains of an organism.
transactional analysis a type of psychotherapy based on an understanding of the interactions (transactions) between patient and therapist and between patient and others in the environment; see also transactional analysis.
analysis of variance ANOVA; a statistical test used to examine differences among two or more groups by comparing the variability between the groups with the variability within the groups.
variance analysis the identification of patient or family needs that are not anticipated and the actions related to these needs in a system of managed care. There are four kinds of origin for the variance: patient-family origin, system-institutional origin, community origin, and clinician origin.
vector analysis analysis of a moving force to determine both its magnitude and its direction, e.g., analysis of the scalar electrocardiogram to determine the magnitude and direction of the electromotive force for one complete cycle of the heart.

## power analysis,

n statistical technique used to determine the number of subjects required to detect differences between experimental or control groups.
References in periodicals archive ?
The additional Power Analysis Application Module enables quick and accurate analysis of power quality, switching loss, harmonics, safe operating area, modulation, ripple, and slew rate (dl/dt and dV/dt).
Simple Power Analysis (SPA): this attack directly uses measurements of consumption power during the execution.
In power analysis, effects are often specified in terms of effect sizes, not in terms of the absolute magnitude of the hypothesized effect, because the magnitude of the effect depends on how the outcome is defined (i.
When counseling researchers want to determine appropriate sample sizes, an a priori power analysis is indicated.
17) While realist IR cannot be blamed for the mistakes of supposedly realist policy wonks, (18) one should not overlook the unforeseen consequences of realism's simplifications of an otherwise complex reality--as with defining interest in terms of power and reducing power analysis to counting 'guns and bombs'.
0, Apache's Totem provides layout-based power analysis for analog and mixed-signal designs.
The new R&S RTO-K31 and R&S RTM-K31 power analysis options provide users with specialized measurement functions for automatically testing the quality of all segments of today s switching power supplies including the mains voltage quality of the input range, the safe operating area (SOA) of the switching transistor as well as the magnitude and spectrum of the output ripple.
The power analysis finds that for currently available mediators, the OLS approach will yield precise estimates of associations between teacher practice measures and student test score gains only if the sample contains about 150 to 200 study schools.
Apache Design Solutions, the technology leader in power integrity and noise closure for chip-package-systems (CPS) convergence, will present a technical paper titled, "Using Emulators for Fast Power Analysis of ARM Processor-based Designs with Apache PowerArtist" at the ARM European Technical Conference in Paris, France on October 21st, 2010.
Agreement Allows Actel to Offer Cryptography Research's Differential Power Analysis Countermeasures to its Customers for use on Actel's FPGAs
Achieves RTL-Level Power Analysis Results with Gate-Level-Like Accuracy in a Fraction of the Time

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