result. It is important to differentiate between the accuracy and the precision of a result. The accuracy of a measurement refers to the "closeness" of a numerical value to the actual or theoretical value. The accuracy is usually measured as the percent difference from the theoretical value using the expression: Percent difference = The precision refers to the “repeatability” of a measurement. The two factors that determine the precision are the measuring instrument (LOR) and the “measurer
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the top loading balance would provide the highest level of accuracy. So the student should go with the top-loading one . . as long as the maximum capacity of the balance being used exceeds 20 g. Otherwise‚ he should use the single pan‚ triple beam balance‚ which has a capacity of 311g and provides a higher level of accuracy compared to the platform triple beam balance. 4. Explain the difference between precision and accuracy? Precision is a determination of the reproducibility of a measurement
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provides sufficient accuracy with much less complexity. The following approximate distance calculations are relatively simple‚ but can produce distance errors of 10 percent of more. These approximate calculations are performed using latitude and longitude values in degrees. The first approximation requires only simple math functions: Approximate distance in miles: sqrt(x * x + y * y) where x = 69.1 * (lat2 - lat1) and y = 53.0 * (lon2 - lon1) You can improve the accuracy of this approximate
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fingerprints‚ which can add undesired weight‚ while handling the coins. The Ohaus Analytical Plus Series analytical balances were used for the weight analysis. An analytical balance is a weighing tool with a capacity that ranges from 1 g to a few kg with a precision of at least 1 part in 105 at maximum capacity.(2) The statistical parameters of both sets can be found on Table 1. Table 1 Calculated Values of Several Statistic Parameters Parameter | Data Set 1 |
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the density of pure alcohol is 0.78504 g/ml.3 From the results‚ it can be said that the density measured by the gravity pipette yielded the greatest accuracy. From the experiment‚ it can be concluded that the instrument used in the process can affect greatly to the result. While the tools with smaller least counts give higher precision and accuracy‚ those with greater least counts do not. Furthermore‚ the result from the experiment is consistent with the fact that alcohol is lighter than water. I
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solution to precise indoor positioning that requires no additional environmental infrastructure. Evaluation of our prototype‚ called TrackSense‚ indicates that such a system can deliver up to 4 cm accuracy with 3 cm precision in rooms up to five meters squared‚ as well as 2 degree accuracy and 1 degree precision on orientation. We explain the design and performance characteristics of our prototype and demonstrate a feasible miniaturization that supports applications that require a single device localizing
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this indicates that the experiment had random and systematic errors that affected the accuracy‚ reliability‚ validity‚ and precision of the results. That being said‚ the results imply that‚ overall; barley seed germination and seedling growth became more effective‚ as the Aquasol concentration increased. This may be due to the fact that Aquasol contains the essential nutrients‚ nitrogen‚
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for DAB capsules‚ results reveal with percentage recovery of 102% and percentage RSD values were found to be less than 2 for accuracy and precision studies. The proposed method was validated for linearity‚ range‚ accuracy‚ precision‚ limit of detection and quantification according to ICH guidelines. Statistical analysis of the results revealed high accuracy and good precision. The suggested procedures could be used for the determination of DAB in bulk and capsule dosage form in quality control laboratories
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chromatogram of Ritonavir and Lopinavir 3.3.2 Method validation The optimized RP-HPLC method for simultaneous assay of Ritonavir and Lopinavir was validated according to ICH guidelines with respect to system suitability‚ linearity‚ sensitivity‚ accuracy‚ precision and robustness. 3.3.3 System suitability Before sample analysis‚ the chromatographic parameters used in this analysis must conform the system suitability parameters within the limits. The retention time (Rt)‚ tailing factor (T) and theoretical
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Introduction: The purpose of this lab will be to investigate the concepts of accuracy and precision for quantitative measurements using density as an example. The density of a sample will be found experimentally and compared to a known value. The relationship of averages and different analysis techniques to percent error will also be explored. Density is a characteristic of a substance which can qualitatively be described as the amount of matter (mass) squeezed into a given space (volume). The
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