Accuracy and precision

proportional and that the small difference is due to systematic errors in the practical. Errors Random errors: A random error is an error in which its effect on measurements vary in each trial. Hence this type of error has an effect on the precision of data. Precision is how close together a set of measurements are regardless of how far away they are from the true value.…

and 0.06 μg/ml, respectively. The accuracy of the method validation…

DISCUSSION: In this investigation, the effect of electrolyte concentration, depth of electrode immersion in electrolyte, and distance between electrodes in electrolyte, on the current flow through copper electrodes were tested. Table 1 and Graph 1 display the results when increasing electrolyte concentration. Evident in Graph 1, the results contained scatter, and consisted of an outlier in the sample in which the ratio of NaCl: deionised water was 10:30mL. The outlier and scatter may have been…

Enantiomeric purity The enantiomeric purity is an important issue to produce pharmaceutical products of acceptable quality. The mobile phase was optimized to discriminate ESO and S-NAP from their chiral impurity (R-isomer). For checking the method ability to separate the chiral impurities from the active isomers of each drug, spiking of the prepared pure S-NAP and ESO isomers with their corresponding racemic mixtures at 1%, 2% and 5% levels of the main peak was done. Method optimization was…

Does a Measurement Result in a True Value? Limitations of Measurements Elizabeth Lechtholz-Zey & Marisa Loredo 10/5/15 CHEM 101-08 Purpose To determine the differences in precision and accuracy in weighing 10 mL of water using a 50 mL beaker, a 10 mL graduated cylinder, and a 50 mL buret. Data Temperature of water: 23.0ºC 100 mL beaker weight: 50.557 g # of additions of water to the 100 mL beaker * 50 mL beaker (±5 mL) * 10 mL graduated cylinder (±0.05 mL) * 50 mL buret…

corner” leads to more clarity. Accuracy is the facts or verifiable data. False data will lead to inaccurate conclusions. Precision is being specific and detailed. Some details may lead to more accuracy, which is why precision is important. An example of precision would be to say 100 individuals instead of saying many individuals. Without relevance, finding out how the information relates to the issue can lead to wayward data. This in turn can lead to less accuracy and clarity. Relevance…

the unknown acid is expected to lie between 0.1064 – 0.1068 M, if the titrations are performed infinite number of times. Out of the three trials, as shown in table 1, trial 1 and 2 both resulted in [unknown] of 0.1067 M reflecting on the precision and accuracy of the titrations. Trial 3 resulted in [unknown] of 0.1065 M, which skewed the average. Determinate error made while pipetting the acid might have resulted in transfer of more acid than 25.00 mL, thus the calculated concentration was…

profession, nurses should provide the patients with information, explain suggested interventions, and let them free to either accept or reject incoming procedures so that they and their families can make a decision about their condition. Precision and accuracy in caring…

water. This may affected the results for how long it took for the Alka-Seltzer to dissolve. To prevent this from happening, using a measuring cylinder and making sure the water level is read by the bottom of the meniscus will help with the water accuracy. A random error that occurred throughout this practical was a different reaction time of when to drop in the Alka-Seltzer and start/stop the stopwatch. This error may have also impacted on the timing of how long it took the Alka-Seltzer. A way…

and of course science. In order to achieve, this IBM Research took 3 years and a team of 20 researchers headed up by Dr. David Ferrucci to deeply investigate and develop the project, to have Watson accomplish its task to compete on the show with precision, confidence and speed. There is a vast amount of information generated…