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Showing 1 to 20 of 1122 for “"Standard deviation"”.
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Simulation Study on Confidence Interval Estimation for Standard Deviation with Non-Normal Distributions
… confidence intervals for the population standard deviation, σ, in non-normal data scenarios. While the sample standard deviation, s, is widely used, its reliability is compromised when dealing with skewed or heavy-tailed distributions and exhibits sensitivity to outliers. Our research …
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Secure Gaussian sampling for lattice-based signatures: new directions for reaching high standard deviation
… sampling of Gaussian distributions with high standard deviation.<br/><br/>The sampling methods chosen for this research are all well-suited to producing wide distributions, in that their complexities do not grow with the standard deviation. Three new sampling algorithms are proposed, securing …
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Pack Level Design Optimization for Electric Vehicle Thermal Management Systems Minimizing Standard Deviation of Temperature Distribution
… have shown that through design optimization, the standard deviation of temperature within the battery cells can be improved by as much as 80% when compared to a conventional design. The standard deviation of temperature saw improvement from an average of 0.2828 K for a conventional design to …
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Effects of herd mean and standard deviation on cow indexes for milk , and adjustments of cow indexes for these effects
… CI were used to predict Modified Contemporary Deviations (MCD) of daughters at three levels each of herd mean (µ) and standard deviation (σ), and regressions were compared to expected values. For Holsteins, regressions were greater than expected in herds with average µ or high σ, suggesting …
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A Monte Carlo study of the robustness of the standard deviation of the sample correlation coefficient to the assumption of normality
… could conclude that for large values of n the standard deviation of r, the usual estimator of the correlation coefficient, and its transform z are only negligibly affected by variation in skewness or variation in kurtosis, the effect being slightly greater for variation in kurtosis. When the …
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Efficient Market Forecasts Utilizing NYMEX Futures and Options
… the market's assessment of the annualized standard deviation of natural gas futures prices. The various implied standard deviations are then weighted and combined to form a single weighted implied standard deviation following the procedures outlined by Chiras and Manaster. This option …
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Evaluation of an adaptive control algorithm for use in uniform droplet spray in droplet based manufacturing
… performance of both droplet diameter mean and standard deviation. Results showed that for the target diameter of 760 [mu]m, the adaptive controller could produce droplets with the mean diameter of 759.9 [mu]m and a standard deviation of 0.0066 [mu]m, while the integral controller produced …
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Comparison of Intracluster Correlation Coefficient Estimates For Binary Variables
<p>The present study evaluates bias and standard deviation of fourteen estimators of the intracluster correlation for binary data. The comparisons were performed in an extensive simulation study. The correlated binary data, assuming an exchangeable correlation structure were simulated incorporating …
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Effect of manual digitizing error on the accuracy and precision of polygon area and line length
… and total line length at varying map accuracy standards. Digitizing error produced no bias in polygon area. The standard deviation of polygon area doubled as the accuracy standard bandwidth doubled, but the standard deviation was always less than 1.6 percent of total area for stream mode …
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What Causes North Pole Ice Thickness to Change
… drafts demonstrated that the mean ice draft and standard deviation may be estimated within +/-0.2 m with the first 3% of a typical 50--60,000 observation data set. An additional 30% of the observations were needed to improve the accuracy of the sample mean and standard deviation to +/-0.1 m.
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Uncertainty Considerations with the GRIM
… between using a conventional approach like standard deviation to using uncertainty. The amount of pairwise comparisons more than tripled from standard deviation to uncertainty showing the need to consider all possible sources of uncertainty in a refractive index measurement.
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Dimensional Changes of ProRoot white Mineral Trioxide Aggregate, EndoSequence Root Repair Material, and Biodentine During Setting Using Digital Image Correlation
… from 0.86% to 2.98%, with a mean of 1.84% and standard deviation of 0.61%. Shrinkage of Biodentine was measured to be 0.43% to 1.88%, with a mean of 1.30% shrinkage and standard deviation of 0.42%. The ERRM expanded from 0.17% to 2.56%, with a mean of 1.23% and a standard deviation of 0.88%, …
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Accuracy of ZeroBase™ Growth Prediction of a Burlington Sample
… from age 14 were the most accurate (within one standard deviation), whereas the predictions from age 6 were the least accurate. In males, the accuracy of cranial base predictions was 73.3%, maxilla was 66.7% and mandible was 97.3% to one standard deviation of the norm. In females, the accuracy …
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Systematic connectivity in single thread meandering alluvial rivers: statistical generalization of hydraulic geometry
… depth are presented as hypsometric curves; the standard deviation of these distributions quantifies depth variability. The experimental runs shows larger magnitude depths and more variability in depths larger than bankfull channel depth. Experimental runs also display lower internal connectivity …
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The effects of the Sea World Talented and Gifted Endangered Species Program on the knowledge of seventh graders
… analysis of pre- and post tests included mean, standard deviation, and ANOVA. Post test scores showed a significant difference between the means of the pre test and post test. Results in the standard deviation show more consistency in student scores on the post test.
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Construction of symmetry triangular fuzzy number procedure (STFNP) using statistical information for autoregressive forecasting
… errors that are included in the predicted model. Standard procedures are also very limited to be followed in order to transform a single-point value into Triangular Fuzzy Number (TFN), which addresses the uncertainty. Thus, the data preparation procedure of Symmetry Triangular Fuzzy Number (STFN) …
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Can the measurement of transventricular intracardiac impedance reliably differentiate haemodynamically stable from unstable arrhythmias?
… rate of 128 Hz between the distal poles of a standard quadripolar pacing/recording electrode positioned at the right ventricular (RV) apex, and the proximal poles of a decapolar catheter positioned within the coronary sinus (CS). Current was injected using an external pacemaker (INOS, …
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Heterogeneity of within-herd variances for conformation and its relationship to various herd parameters in the U.S. Holstein population
… correlation (r = -.59) between within-herd standard deviation for final score and herd-mean final score. Regression analysis suggested a curvilinear decrease (concave up) in within-herd standard deviation for final score with increasing herd-mean final score. Within-herd standard deviations …
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Cyclostationary Random Vibration of a Ship Propeller and a Road Vehicle
… excitation using a CS process and calculate the standard deviation (root mean square) of the vehicle response. In the case of the ship propeller, we calculate the hydrodynamic forces acting on the propeller using the vortex panel method and the vortex theory of propeller. Considering the …
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